Torres was of a higher class, and so long as he's the stronger man in there, he shouldn't have too many issues with Lopez.
This would be a test of Torres' toughness and durability IMO. Torres is the more skilled and polished fighter, but I think there's a big question as to whether he holds up if Lopez tears in and lets the bombs fly.
I think Torres gets sold a bit short as a fighter. I think he beats Yauqi by clear UD in an excellent fight.
He was quite a protected fighter though, IMO - his people kept him away from the top MWs at a time when the division was quite deep, then he made a run for the LHW title during a window when the division was somewhat weak-ish.
Hence, why I wouldnt pick him over any LHW greats. Yauqi is a level Torres can handle. I don't think it's a foregone conclusion, but I think Torres' better craft, better defense, and better handspeed should win the fight.