I have had both. I currently own the Spec Bump. The Heat is a good knife and the AO is very good. The knife is very well made and is on the smallish side. I currently own one of the FPR Spec Bump in CPM154. At first honestly like Martial said it was way differant but then it grows on you. Now I have had a BM710D2, Buck 882SBTG, Spyderco Manix and others as you can see I still have the BUMP! I just love the way it feels and you always have the WOW factor. Just my opinion. Thanks.