Not entirely sure, but I'd favour Arguello. Everett would be dwarfed by Arguello (he was dwarfed by Escalera, and Arguello was even bigger than Escalera) and I think he'd struggle to take Arguello's shot. Having a good chin might not be enough against Arguello (as Mancini, Olivares, Escalera and numerous others found out). You need a great one, and I'm not sure Everett has one. If he can take Arguello's shot I think he can outbox him and win a fight narrowly on points. I think I'll go with Arguello though, to knock him out, as he does, in the last 3rd of the fight.
Tyrone has a slight chance to win, but truthfully, this was Arguello's best weight, so I'm going with Alexis on 13th round stoppage.
Russell Peltz stated that Everett would've given Arguello hell. Of course he was Everett's promoter. I tend to agree with him though. This would've been a great fight and I believe it would've gotten to the point that Arguello would need a stoppage to win it. I just didn't see enough from Everett to think he could navigate 15 rounds against Arguello. I think Arguello would've invested more in a body attack than Escalera did against Everett. I'll say Arguello stops him in 14. Everett was no joke though. Very difficult fight.
If Everett bleeds against Arguello the way he did against Escalera, Alex carves his way to a late stoppage. No orthodox champion was more consistent at devouring southpaws of all styles than Arguello. Before posting this, I reviewed Escalera-Everett. (I had Everett winning 145-142, having clinched the scoring before the championship rounds, which I thought Escalera swept on aggression.) Alex would have been hooking to Tyrone's body and shooting right leads towards his sternum. Arguello could also jab southpaws effectively, as he demonstrated in the Navarrete bloodbath. He would have also done a better job ducking Everett's southpaw jab, as he did Busceme's.