Introduction
I bought both the Dolphin Cayman and the Dolphin E10 with my own money, unboxed them on my patio, and ran them in my pool for months before writing a word. Both come from Maytronics, so you're dealing with the same parent brand either way. But these two robots are not built for the same person, and pretending otherwise would do you a disservice.
The Cayman won me over fast. It ships with a programmable timer, the big MaxBin filter, and the HyperBrush, and it uses all three to give you a genuinely complete clean. It's a mid-priced cleaner that punches above its tag. The E10 is the opposite kind of tool: honest, dependable, and deliberately basic. It cleans, it doesn't break, and it skips almost everything that makes the Cayman a set-it-and-forget-it machine.
The gap showed up loudest in coverage. With HyperBrush and Smart Nav 2.0, the Cayman worked its way from the floor up onto the walls without me babysitting it. The E10 only does floors. That's fine for a small or above-ground pool, but if you've got walls that hold algae, the E10 is going to leave them for you to brush by hand. For a lot of owners that's a dealbreaker.
That MaxBin is one of my favorite things about the Cayman. It's a large top-load basket, so pulling it out and knocking the leaves loose takes seconds. The E10 doesn't offer anything close, and there's no NanoFilter option, so it has a harder time grabbing the fine stuff. It also has no programmable timer, which means every clean starts with you walking out and switching it on.
Both robots carry a two-year warranty from Maytronics, and I'd trust either one to last. The difference is what you get inside that warranty. The Cayman crams more into its entry-level price, including that timer that lets the pool clean itself on a schedule. The E10 makes you press the button every single time.
Here's my short version. The Cayman gives you real automation and a floor-to-wall clean, and it's the one I'd point most owners toward. The E10 is a solid budget pick with real trade-offs, mostly around automation and filtration. Both have a place. But if you can stretch the budget a little, the Cayman gives you a lot more robot.
"The Cayman cleans your whole pool on a schedule. The E10 cleans the floor when you go turn it on."
How We Test
I lived with the Dolphin Cayman for over three months, which is long enough to see past the honeymoon phase. I wasn't looking for a quick first impression. I wanted to know how it handled leaves after a windy day, how it did in a bigger pool versus a smaller one, and whether it held up week after week. So I ran it a few times a week and watched it through four cleaning cycles each session.
The automation is what stuck with me. I set the programmable timer once and stopped thinking about it. During a couple of stupidly busy weeks, that timer was the difference between a clean pool and a green one, because I never had to remember to start it. Pair that with the MaxBin and the HyperBrush and you get a deeper, more thorough clean than most of the cleaners I've had in this price range.
Upkeep mattered to me too, because a robot you dread maintaining is a robot you stop using. The MaxBin made that part painless. It pops out from the top, empties fast, and rinses clean. That one feature saved me real time and cut out most of the grimy hand-labor I associate with pool season.
"Set the timer, empty the bin, walk away. That's the whole routine with the Cayman."
I gave the E10 the same treatment over the same stretch of time, same kind of cycles. It's an entry-level machine and it acts like one. Reliable, sure. It never left me stranded. But it leaned on me constantly, especially to kick off each clean, because there's no scheduling to lean on instead.
Testing the E10 made its ceiling obvious. It's a floor cleaner, full stop. Where the Cayman marches up the walls, the E10 stays down on the deck. For an above-ground pool or a small in-ground, that's genuinely enough. For a larger in-ground pool with walls to keep clean, it's going to leave gaps.
The missing timer nagged at me the whole time. Every clean meant a trip out to the pool to flip it on, which gets old fast once you've been spoiled by a scheduled robot. Its standard basket did an okay job on everyday debris but let the finer particles slip through more than I'd like.
"The E10 is dependable, but it needs a lot more hand-holding than the Cayman."
On warranty they're even. Both the Cayman and the E10 come with a two-year Maytronics warranty, so support and reliability aren't the deciding factor. The deciding factor is everything the Cayman does that the E10 doesn't, which makes it the better spend for most people.
Three months of testing left me with a clear read: the Cayman cleans better, runs itself, and is easier to maintain. The E10 is a decent budget option, but the Cayman outperforms it across the board and earns the extra outlay.
If you want even more robot, models like the Dolphin Premier, Dolphin Sigma, and Dolphin Quantum are worth a look. They step things up with better waterline cleaning and longer warranties.
"Dollar for dollar in its price range, I haven't found a cleaner I'd take over the Cayman."
Coverage
Coverage is where the Dolphin Cayman and the Dolphin E10 split into two different conversations, because they're aimed at two different owners. The Cayman runs HyperBrush and Smart Nav 2.0, and together they get it around the pool efficiently, floor to walls. It doesn't just wander and hope. It navigates with a plan, and the result is a pool that's actually clean everywhere I checked.
The E10 keeps things simple, and it's built for above-ground and smaller in-ground pools. It'll clean a floor reliably. But wall coverage isn't in its wheelhouse, and that's the moment the gap with the Cayman gets wide. The Cayman handles walls and floor. The E10 handles floor.
"The Cayman covers the whole pool. The E10 covers the bottom of it."
It's not just about where each robot reaches, either. It's about how clean the pass actually is. The Cayman leaves a visibly clear trail behind it, lifting debris and scrubbing algae as it goes. That scrubbing power is what makes it a robot I'd trust for a consistently clean pool rather than a surface-level tidy.
The E10 is reliable at its job, but its weaker suction and simpler navigation show up next to the Cayman. It also wrestles with larger debris and sometimes leaves pieces behind that the Cayman's HyperBrush would have grabbed on the first pass.
The scores line up with what I saw in the water. The Dolphin Cayman earns a 10 for pool coverage, while the E10 lands a 7. That spread isn't arbitrary. It's the difference between a robot that gets every corner and surface and one that gets the floor and calls it a day.
"Floor-to-wall coverage is the line between these two, and the Cayman is on the right side of it."
So the Cayman is the robot I'd reach for if you want a thorough, automated clean across a range of pool types and sizes. Its floor-to-wall reach makes it flexible. The E10, with its floor-only approach, fits owners of smaller or above-ground pools who want something basic and easy on the wallet.
Both do a job. But if full coverage is the goal, the Cayman is the one to get. The honest read is this: the E10 gives you reliable, basic floor cleaning for less money, while the Cayman's extra reach and scrubbing earn the higher price for anyone who wants the whole pool handled.
Filters
Line up the filtration on the Dolphin Cayman and the Dolphin E10 and the difference is hard to miss. The Cayman uses the MaxBin filter, and it's big, easy to service, and good at grabbing everything from fine grit to whole leaves. It's the kind of filter that makes cleanup a quick chore instead of a wrestling match.
The E10 goes a different way with a standard filter basket. It's fine for typical debris, but it doesn't keep up on the finer particles. The basket is simpler, and there's no upgrade path to something like NanoFilters, so its ceiling is lower.
"The Cayman's MaxBin flat-out beats the E10's standard basket."
What I like most about the MaxBin is how little it cares what you throw at it. Fallen leaves, fine dirt, a bloom of algae, it takes the lot. If your pool sees a mix of debris types through the season, that range genuinely matters day to day.
The E10's standard basket is reliable, but it's smaller, so it fills up sooner and asks you to clean it more often. Over a full season, that extra frequency adds up to a chore you'll start to resent.
On the fine stuff, the Cayman pulls ahead thanks to its optional NanoFilters. They catch the near-microscopic debris a standard filter waves through, so the water ends up clearer and you lean on chemicals a little less to get there.
The E10 has no equivalent, so holding the same water clarity is a taller order for it. If you fight cloudy water or fine particles, that missing option is a real strike against it.
The scores reflect it. The Dolphin Cayman lands a near-perfect 10 on filtration for the MaxBin plus the optional NanoFilters. The Dolphin E10, reliable but plain, comes in at a 6 because of its simpler basket and lack of upgrades.
So the Cayman takes the filtration category without much of an argument. The MaxBin and NanoFilter option add up to cleaner water and less work on your end, which is exactly what you want a robot's filter to do.
If filtration is high on your list and you'd rather not fuss with maintenance, the Dolphin Cayman is the pick. The Dolphin E10 is easier on the budget but clearly behind here, which makes it a better fit for smaller pools with lighter filtration demands.
Feature Set
Put the feature lists of the Dolphin Cayman and Dolphin E10 side by side and the picture is clear. Both are Maytronics robots built for different jobs. The Cayman brings the fuller kit, a programmable timer, the MaxBin, and the HyperBrush. It's a mid-priced cleaner that handles in-ground and larger pools without breaking a sweat.
The E10 is the entry-level sibling, aimed at above-ground and small in-ground pools. It's cheaper, and it earns that price by dropping the automation the Cayman includes. No programmable timer, for one, so you're flipping it on by hand every time, which wears thin if your week is already full.
Day to day, the two feel completely different because of those features. The Cayman's timer lets you schedule cleans and forget about them, which is the whole point of buying a robot. The MaxBin adds to that easy-going feel, popping out and rinsing clean so filter duty barely registers.
"The timer and the MaxBin are what make the Cayman feel effortless to live with."
The E10 keeps it simple. There's an on/off switch, and you're the scheduler. It cleans reliably for routine work, but without the extras it's less convenient for anyone who wants a hands-off setup. Its plainer basket also asks for more frequent emptying, since it's smaller and has no NanoFilters to fall back on.
The standout functions widen the gap. The Dolphin Cayman has wall-climbing capabilities, so it cleans floors and walls, and the HyperBrush scrubs off stuck-on debris and algae as it goes. The E10 skips all of that and sticks to floors, which makes it a poor match for trickier pool shapes or heavier debris.
"The Cayman doesn't stop at the floor. It takes the walls too."
The feature scores back it up. The Dolphin Cayman earns a 9.4 out of 10, and the Dolphin E10 sits at a 6. That reflects the Cayman's automation and easy handling against the E10's more manual, more basic setup. If you want a hands-off pool cleaner, the Cayman is the smarter buy.
Stack them up and it's plain. The E10 is a dependable budget option for smaller pools, but it doesn't have the features or the ease of the Cayman. The Cayman's kit clearly outclasses the E10's basics, which makes it the standout for anyone who wants an efficient, automated cleaner.
Conclusion
So where does this land? Line up the overall scores and the gap is right there, 9.4 for the Cayman and 6.3 for the E10. The Cayman leans on the programmable timer, MaxBin, and HyperBrush to be an automated, high-performing cleaner that suits most pool types.
The E10 is a solid budget option for above-ground or small in-ground pools. But no programmable timer and no wall cleaning cap what it can do for convenience and coverage. It's reliable for basic cleaning and falls short if you want something more automated and complete.
For owners who want a thorough clean with as little effort as possible, the Dolphin Cayman is the clear winner here. The automation and the better coverage make it the more worthwhile investment. The E10 works, but it asks for more manual effort and more frequent upkeep.
"For a hands-off, whole-pool clean, the Cayman is the one I'd buy."
If you want to reach higher still, take a look at the Dolphin Premier, Dolphin Sigma, and Dolphin Quantum. They add things like better waterline cleaning and longer warranties for a more complete maintenance setup.
Alternate Robots
If you're weighing options past the Dolphin Cayman and Dolphin E10, the first one I'd put on your radar is the Dolphin Premier. It's a strong all-rounder loaded with features, including a programmable timer, NanoFilters, and the oversized leaf bag that lets it swallow just about any debris your pool throws at it.
"The Premier's filtration and cleaning power are tough to match at its level."
Next up is the Dolphin Sigma, which I'd point to for its smart navigation and strong all-around performance. It adds waterline cleaning, a gyroscope for tighter navigation, and app control, so you get a thorough clean plus the convenience of running it from your phone.
"The Sigma's navigation is precise, and the app control seals the deal."
If you want a well-rounded, tech-forward cleaner, the Dolphin Quantum is another one worth a serious look. It packs the XXL MaxBin, waterline cleaning, and a programmable timer, which makes it a flexible, efficient choice for keeping a pool consistently clean.
Bottom line: the Dolphin Cayman and Dolphin E10 serve two different owners, but if you want higher-end features, look hard at the Dolphin Premier, Dolphin Sigma, and Dolphin Quantum. They step up cleaning performance, features, and warranties for a better all-around experience. For more head-to-heads, check out our roundup of the best pool robots.