Elegoo Mars Pro vs. Elegoo Mars: Which resin printer should you buy?

Elegoo made a massive splash in the 3D printing hobbyist scene with the Mars, a small form factor MSLA/Resin 3D printer that was cheap, easy to use, and made prints of such high quality they were almost magical. The Mars Pro is Elegoo's latest machine, and it is looking to replace the original Mars with this update. Does the Mars Pro have enough new goodies to make you upgrade from the Mars? Let's put them head to head.

Head to head

Source: Windows Central (Image credit: Source: Windows Central)

The Mars Pro isn't a groundbreaking change from the Mars. You aren't going to find any radical changes here, but what you are going to see is a steady improvement in most aspects of the machine. For example, the UV LED used to cure the resin is the same on both models, but the Pro has a matrix that helps improve the quality and speed at which you can print. It's little touches like that that make the Pro more appealing.

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Header Cell - Column 0 MarsMars Pro
Build Volume4.72 x 2.68 x 6.1 inches4.53 x 2.56 x 5.9 inches
LCD Resolution2560 x 14402560 x 1440
Light SourceUV LEDMatrix UV LED
Carbon filter ventilationNoYes
Front USBNoYes

Several upgrades directly address issues with the original Mars as well. On the first Mars, the screws that secured the build plate in place — the ones you used to level the plate rather than the one that holds the plate on — were small and, over time, could slip, causing the build plate to move out of alignment. The Mars Pro addresses this is in the most natural way possible; it replaces the small screws with large ones. The build plate is not going any on the Mars Pro unless you want it.

I cannot stress enough how much I appreciate the Mars Pro having a USB-A port on the front of the printer.

Elegoo has also added a carbon filter to the Mars Pro. When you use it in conjunction with a rubber seal, the carbon filter draws the smell and any potentially harmful pollutants through a carbon filter before it expels it into the air. This allows you to print in potentially more places around your home or office as the 3D printer is no longer polluting your atmosphere. Of course, I would still recommend opening a window, but the carbon filter makes a big difference.

Thankfully the carbon filter works almost as well without the rubber gasket because the gasket is terrible. It is way too big for the lid of the Pro and doesn't sit very well at all. You are better off leaving it in the box and just using the cover the way it was originally intended. Oh, and the lid is now one smooth piece of acrylic with no seams, which looks fantastic.

I cannot stress enough how much I appreciate the Mars Pro having a USB-A port on the front of the printer. I still have to reach around to turn it on, unfortunately, but at least I don't have to spill resin all over myself to add models to the printer. Thank you, Elegoo!

The most important thing

Model Vs Model (Image credit: Windows Central)

Double Supes (Image credit: Windows Central)

Source: Windows Central

Whether you choose to upgrade from the Mars to the Mars Pro is going to be based almost exclusively on the print quality. After all, that's the reason we buy MSLA printers because the print quality is impressive and beats an FDM printer every time. The original Mars had a fantastic print quality — it's what made it so successful — and the idea of the Pro is to take that print quality and elevate it.

Bill the Butcher looking left (Image credit: Windows Central)

Wolf by Trajan 1990 (Image credit: Windows Central)

Bill the Butcher by Fotis Mint (Image credit: Windows Centrral)

Source: Windows Central , Windows Central, and Windows Centrral

It doesn't, though, which is a shame. The Pro makes amazing prints, no doubt, but to the naked eye, they aren't better than the original Mars in any meaningful way. The Mars Pro is faster — an average of 5 percent faster per print — but the models themselves could have been printed in the same machine.

The Mars Pro has everything going for it that should improve prints; a more secure bed, a better UV matrix, even the vat is designed to be better. When you look at the finished models though, like Bill the Butcher by Fotis Mint, or the incredibly detailed Ornate Wolf from Zane Rogers, it's impossible to tell which model was printed on the Mars and which was printed on the Pro. I printed two identical Superman busts from Fotis, with identical settings, and, while the Pro finished a few minutes earlier, I cannot see a difference. Even zooming in with a macro lens doesn't show enough distinction to call which print is better.

So the question becomes this; if the Pro is around $40 more expensive and yet doesn't give any better print quality, is it worth the upgrade?

So is it worth the upgrade?

Source: Windows Central (Image credit: Source: Windows Central)

If the question is, should you buy the Mars Pro to replace your perfectly working original Mars, then the answer is an emphatic no. The upgrades are significant, but if you have already been using a Mars to produce amazing prints, then you don't need to drop $250 to replace it.

However, if you are new to 3D printing or you want to increase the number of printers you have, it makes good sense to buy the Mars Pro. While the upgrades don't add quality to the prints, they do add value in other areas. Having a printer that doesn't spit out toxic fumes is excellent, and not having to relevel the build plate saves time and failed prints. Even the way the build plate is polished adds to the chances of successful prints, and the front USB is chef's kiss for me.

All the small additions to the Mars Pro add up to much more than $30-$50 in value, so the Pro is a no-brainer if you are starting from scratch or adding to your printer army. Maybe Elegoo would have been better off calling it the Mars S, or the Mars 1.5, as the term Pro conjures up more of an upgrade than this model gives.

Regardless of the name, though, I wouldn't hesitate to recommend the Mars Pro to anybody. It's as brilliant as the original with some great added features.

James Bricknell

James built his first PC when he was 13 and has never looked back. He can be found on Windows Central, usually in the corner where all the 3D printers are, or huddled around the Xbox playing the latest games.