'midget Aydin' is a very compact strong fighter, Guerrero was going up two divisions and had a long layoff.
I think Berto will start off fast but I have little faith in his gas-tank and I think his footwork is horrific, he is top-half heavy. If he hasn't got Guerrero out of there within 6 he is in trouble IMO and will get outboxed from then on out.
I don't think people realise how good Guerrero is, especially inside. His inside game is very underrated, he tore Aydin up inside, Katsidis too. Very subtle, intelligent fighter.