I think Ken was a bit rusty, but there's no denying that Brad manhandled him. As to which is a better player, it's a toss-up. With a different set of categories, a third player other than Jerome, or Ken playing more games prior to the final, it might have turned out differently.
The only true way to know is to kidnap both Brad and Ken and have them play Jeopardy head-on until you say stop!
-geoff