[tarentel]

Some of the UI is really tiny on the smart phone version of the lichess app is my only complaint against their UI vs chess.com. As far as I'm concerned though they both could use a good designer. Neither of them are very good.

Besides that I tend to use, and pay for, chess.com more for their other features than for anything directly UI related. Their puzzles are better. I think their post game analysis is nicer to use, the way they do analysis in general is easier to use than lichess I think. They also have a lot of learning material.

As far as playing games go, I have friends who use both and therefor I play on both. It's about the same as far as I'm concerned.

[nwienert]

In retrospect UX rather than UI would have been better in my post as I agree with this mostly (and I'd love a chance to redesign either app, that'd be a joy).