HD - I have a Martin Buck Hunter, Cheetah, and Firecat. I just love the way they feel and shoot. Last year I had a brand new string explode on the Firecat and cracked one of the limbs. I took it to the shop and Martin sent in new limbs, cams, axles, cables and string. And the parts they sent to the dealer were Onza parts that fit my Firecat's riser. So I basically have an Onza with a Firecat riser. And this bow is nice. Faster than before and so smooth.
But I would shoot them both and see what one YOU like the best.