First of all I think it's one of the hardest fights to pick...
The only differences are the jaw (Nonito is better) and professional experience (Nonito has more). With that being said I say Nonito ...
I believe that his experience will make the difference.
Rigondeaux has technique but on a professional level its different.
There has been several amateurs who have been well decorated and climb into the ring with someone who has the same abilities and skills but the experience prevails. I also think that at some point they will trade shots and I feel Nonito is more willing to trade shots as opposed to Rigondeaux whom I think will slide under or move to the side and wont trade blows. I think Nonito will get the TKO win when he's on the ropes and Rigondeaux is coming in, Nonito will catch him just then.