I only very recently picked up chess and spend most of my time playing against the computer. lichess's computer plays really, really weird at low levels, not human-like at all. Chess.com's computer plays a bit more human-like, at least up to 1100, which is the computer level I'm currently playing against, but still not like a real human.

I would compare it as: lichess - best move, best move, best move, completely random move that does absolutely nothing chess.com - best move, good move, best move, blunder that seems patronizing given previous moves

I've only played a handful of games against real people online, but those games weren't anything like either lichess or chess.com's computer players.