I personally think Bisping is the most overrated fighter to come out of The Ultimate Fighter.
He has a padded record and he's fought a lot of bums, his decision win over Hamill was utter bullshit and I think the fight scoring was incredibly biased.
Leben has made major improvements since his two back to back losses to J-Mac and Starnes. Plus his experience against guys like Cote, Radach, Swick, and believe it or not his loss to Silva becaus since that loss I think he's really matured not only as a fighter but as a person
I think now that Chris is taking his training more seriously, he'll have the tools to beat Bisping.