Well, Khan is a better fighter overall than he was with Roach. His offense has regressed a little, but he's also a little better defensively being that Hunter doesnt let him over commit to his combinations leaving himself open for return fire to his weak chin.
He wont be able to beat One Time though, but his victory over Alexander was more impressive to me than Thurman's over Guerrero (considering the caliber of opponent).
I was just saying about Khan, he shouldnt be talking down on Thurman unless he's ready to get in the ring with him and prove it. They're in the same weight class. If Thurman is only a 6 Round Fighter, expose him