Pretty much entirely assumptions at this point. Both are obviously significantly stronger than they were prior to their respective training on Wano, so comparing them is fairly pointless until we get a better reference of their power compared to each other. If it was pre-Wano though, I'd probably say Zoro's best abilities would trump Gear 3rd when considering Zoro considered that not impressive enough to solidify Luffy's rank as captain when in Fishman Island until Ruffy displayed Haoshoku Haki.