Posting this here because I want to hear from people who actually know Boxing. So any thoughts @ 140 lb.
Guerrero easy. I'd say Guerrero is probably a shade better than Manfredy, and Spaddy ran away from Manfredy all night long. Guerrero would make him run entirely out of the ring.
Spadafora, he hasn't proven himself in the pros but he was on par with a young Mayweather in sparring.
Spadafora was actually a decent fighter. He would have starting losing eventually if he'd started stepping up in competition before he got in trouble, but at one time, he was a decent fighter. Better than, say, Mickey Ward, and maybe even Gatti. On a prime Malinaggi talent level, I'd say.
I respect Spadafora, but we're talking about two different levels here. Guerrero would beat him soundly start to finish.