If I am 1750 fide rating in rapid, am I supposed to be 1770 in chess.com

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belligol371
In December I had 2 very good rapid tournaments where I finished 3rd place and another one where I won against a WFM with a performance of 1900. I had played another tournament with performance of 1500 so it justifies that I’m not above 1800. But on chess.com I struggle more to win and I don’t know why. Am I just bad playing online chess or am I better playing over the board?
justbefair

Where did you come up with the number you are supposed to be?

Online games have certain advantages and conveniences. There are also disadvantages.

I can't agree that ratings should be similar.