If Oscar can bully Floyd around like Castillo, with his superiour size and strenght he will win...
I think people may be overestimating Floyd a little bit since he's undefeated but there is always someone around the corner to beat you, Oscar has the handspeed and size to bully Floyd....
And tbh I don't think Floyd can really hit hard at that weight, he couldn't knock out Judah so he won't knock out Oscar.