Chat was does a "guy diff" mean?

idk heard fns say it on stream

one team's player > the other team's player

usually applies to the star player/s

That the players on one team are diffing the other teams players. when the other team is just performing better mechanically there's not much that can be done. thats why he says that its unexpected that a team like NRG gets guy diffed

First off, NEVER call me "chat" again.

Secondly, LycheeBlade explained it pretty well