samthegooner I see what you're saying, but I don't think it matters in terms of this season if he's as good as Gvardiol. What matters is if he's better than who they'd have to play if they didn't sign him.
I think it'll be a tight race. If you're not worried then you either must not think Guehi will be able to give them 1-2 extra points or you think we'll win by a decent margin so those extra points are irrelevant anyway. And you might very well be right, of course.