Umvc3 vs MvcI

Having a rough time deciding whether or not I should choose Ultimate Marvel Vs Capcom 3 or Marvel Vs Capcom Infinite, I’ve seen little videos and comparisons but from the perspective of long time players who’d easily spot pros and cons could a few of you perhaps point me in the right direction…my gamer instinct is telling me Ultimate 3 for a good time and better overall gameplay while the story mode player in me is itching for the cutscenes of infinite..another thing, which MVC between 3 and Infinite has the better roster in terms of gameplay and overall fun ?