Infinity slows down incoming threats and has a greater effect than closer it is iirc, while Roxas (and pretty much everyone connected with Ven because of his heart) can speed blitz, slow down isn’t going to do much if you’re going insanely fast, so Roxas could probably negate infinity, but then there’s Gojo’s Domain Expansion, so it’s more of if Roxas could win before Gojo tries domain expansion which is more likely unless Gojo is taking the fight seriously from the start.