I talked about this in another thread, hopefully I can get the same essence.

Diaz and Katsidis are both coming off loses, but Katsidis comes off his loss the better of the two.

When Campbell took the fight to Diaz, Diaz took quite a beating. He was used to controlling the fight, but when someone was able to do it to him, he folded and couldn't find an answer.

Katsidis began his fight with Casamayor by being knocked down twice, then went on to lose the next couple of rounds. All of a sudden Kats showed his heart and fought his way back and even led at one point in the scorecards. And if you forgot, knocked Casa out of the ring.

When Diaz needed to show heart, he couldn't find it, when Katsidis had to dig deep, he shined (even though he got blasted in the end).

I see Diaz outworking and controlling the first couple of rounds against Kats. Eventually Kats doesn't bow down and Diaz gets discouraged. Kats then fights his way back to the scorecards and stops Diaz late in the fight.