tough call. similar in speed, power, size. Guerrero a bit better technically and a bit more versatile. Also more disciplined and thus less likely to get sucked into a war unnecessarily. Guerrero UD 12
Guerrero is just a bit better than Lopez imo, who I admire a lot but who last lost against any top fighters he has faced except Ortiz (he was behind on those scorecards too). I would potentially be a very entertaining scrap though