I would always say chess.com but after losing my last two games because chess.com randomly disconnects me while I have perfect connection to the website (only disconnect from the game itself) I might just move to lichess tbh.
That's a server issue the servers probably laggy on your end(or chess.coms ) even if the connection is fine thats mostly why I only play bullet on lichess the occasional 3 second lagg spike
i have a question, i have a similar topic before why i only got a few comments?