Could Loma beat a Cuban that he doesn't have a two weight class size advantage over? A Cuban who actually had heart, I might add. Nah, but in all seriousness, I think this a very good mesh of styles. Loma more physically talented and more active, but Casa I would argue was more technically solid, and his left hand was more dangerous than any single Loma punch. I can see a case for either guy.
Yeah, I'd make Loma the favorite over Casa, to be fair. Joel is extremely live though. If Loma walked into a good left hand from Casa, he could be hurt. But if forced to pick, I would say Loma wins like a 7-5 decision.