power band while with the dinan, only at WOT the power can be felt. the prices are the same....but if you're getting a "deal" on the dinan....im sure it wont be more than 50 bucks or so cheaper than the jim c.....do urself a favor and get the best so in the future you wont have to ask yourself "would i have felt more power if i spent $50 more and got the shark." then again....its your call.....and that's just my $0.03........=)