Hearns will and should rightfully be a 80-20 favorite. I'm not saying Hearns was overall better than Floyd, but a 6'2 WW with great boxing skills combine with great power is just too much for any version of Floyd(especially as people already know Floyd was a natural 130-135)
Everyone else, Floyd should be a favorite or slight favorite. Duran is a toss up. But I can see him winning both fights (or losing both).