Manny's speed would trouble Alexis but Manny can't resist a tear up which could cause him huge problems against a puncher of Arguello's class. If Manny employed movement and boxed conservatively then he could cruise to a points win but when did prime Pac ever really do that? He generally overwhelmed his opposition with volume punching but Morales showed that you could time him and that Manny was too proud to give ground to reset, hence being there to hit. This could spell doom against Arguello who had top shelf power, brilliant accuracy and was elite at picking openings. I don't often pick against prime Pacman but Alexis Arguello is one person I would favour over him. I've always thought a Johnny Famechon type, who fought defensively, had brilliant footwork and movement, was excellent at slipping punches and kept his chin in check at all times would be a bigger stylistic problem for an Arguello rather than a whirlwind firebrand who can't resist a brawl like Manny. It'd be a brilliant fight though, that's for sure.
Completely unknown and impossible fight to pick styles wise. Manny struggles with straight right hands. Arguello struggles with speed. So, we just have no idea.
I sure don't think Manny likes that brutal left hook to the body this guy threw. He had a lot more in his arsenal than that big right hand===he just used that punch to finish fights. Same here w/ Manny---hurt to the body and gets tagged with a big right hand once that mobility slows down from the bodypunching effects from Arguello.