The Spaddy of the Cardona fight versus the O'Grady of the Kenty fight. Both guys were about 22-23 years old in those respective performances.
If it comes down to "outworking" then O'Grady will win. I think that I have only seen two Spadafora fights and I wanted to be impressed but I wasn't.
Spaddy threw over 900 punches vs Dorin. O'Grady was out-worked by Gonzalo Montellano. I don't think it's a given that O'Grady throws more.
I wouldn't be confident in Spada's ability to produce that many punches if it were O'Grady attacking him instead of Dorin. I think Spada would get the Kenty treatment.
I think I side with Ring Leader here. Spaddy could afford to maintain a high workrate against Dorin, as Leo was devoid of any power. I might add, Spaddy STILL got his ass kicked in that fight, and it wasn't even close. I haven't watched it in about 15 years, but I remember Dorin winning arguably 9-3. But I digress - its a different story with Spaddy opening up that much against O'Grady, as Sean could punch and was very accurate and very punishing to the body. I agree with the Kenty version of O'Grady winning - either a UD, or quite possibly a late stoppage.