That's not exactly true. chess.com matches closer to FIDE in the 1400-2000 range and lichess matches in the 2000+ range, whereas chess.com gets inflated in that

That's not exactly true. chess.com matches closer to FIDE in the 1400-2000 range and lichess matches in the 2000+ range, whereas chess.com gets inflated in that range. All in all, they are all different systems with different player bases.