I have to go with my man Soto.

This would be a great fight, I like both guys, they both would give it their all in the ring, but Soto is the smarter boxer IMO. He can also take a lot of punishment, which would be key in the opening rounds, since I think Valero would probably start the early rounds with guns blazing. I think that Soto would get through those rounds, and his body attack would eventually slow Valero down by mid-rounds, were Soto then could get a TKO in the later rounds.