I think its important to consider that not all c-boarded cats are created equal. Whereas most of the C-board cats thus far have been A-class and C-class cats and some marstrom 20's, its difficult to call the platforms even and comment on the performance of the boards alone.

I'm wagering that the F20C behaves much differently than an A-cat with curved boards. Sure they may share some similar behaviors, but I'm willing to bet that the differences in platforms account for a significant change in behavior.