Lichess has less chess variants, less learning content (made by IMs and GMs), and has some gameplay differences:

  - on chess.com you can premove multiple times, each premove consume 0.1s on the clock
  - on lichess, you can premove only one time, but it does not consume time on the clock

Also the player pool being different, the rankings are not equivalent, and chess.com's player pool is bigger.

Also, from personal experience (so this is only anecdotal), the most toxic players (insulting in the chat, or ragequitting, ...) I met were on lichess.

Comments of the form "X is better than Y" are subjective and do not add any value/information to the discussion.

lichess.org >>> chess.com. I encourage everyone who can afford to donate to do so!

And it respects your freedom

I don’t mind paying for something particularly if it means the people who run it can make a living from it —- and hopefully ensure it’s still around in 10 years time.

Where can I get my soul crushed by Mittens on Lichess?

I've used both and would rather be a free user of Chess.com than Lichess.org.