I think it hinges on whether Mob's psychic powers can bypass Gojo's Infinity.
Either direct psychic manipulation does not rely on anything physical, in which case Mob wins outright, since he can just crush Gojo instantly, or it does rely on something physical (like psychic energy enveloping the object), in which case Gojo probably wins, especially with his domain expansion - if Mob can't actually use his powers, his body is really frail. I have only seen the animes for them, so I can't really say anything beyond that, but I think that's what it comes down to.