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This is a common misconception and the ratings are not comparable across player pools. lichess starts you off at 1500 and so the center of the bell curve is 1500, chess.com starts you off at 1200, so that's where it balances the 50% at.

https://lichess.org/stat/rating/distribution/blitz

https://www.reddit.com/r/chess/wiki/faq#wiki_my_chess.com_ra...

You can't say that based on the ratings. The parameters of the Elo system can be freely chosen, so you can't compare two implementations at all.

Maybe, but it doesn't really matter in practice. If you play against opponents with a similar rating to you then you'll be evenly matched.