This topic has come up a lot over the years, and we always rehash the same arguments.
My fundamental feeling is you can't compare games. Even the same machine can play differently from week to week. Dirty and needs a shop vs freshly waxed alone is gonna play differently.
I understand the appeal, but to me at least if you want to compete with someone you gotta be there, on the same game, playing at the same time. Anything else just introduces so many variables that kills the legitimacy of the competition for me. You want to do it for fun and don't care? Hey cool. But it seems somewhat pointless to me really.
But maybe I'm missing different possibilities, I'm open to learning more. Just feels like that basic "compete over the internet" part is built upon a shaky foundation, whether it's my machine vs your machine, or me vs you on the same game on location but at different times.