OK so while diving i lost one of my Xpert zoom SF-8s. Not wanting to buy a whole new set i found a single Xpert zoom Z3 for 10 bucks. so i bought it. The only difference i can see is a slight change in the vortex generators on the fins and the fin is about an inch longer. What are your thoughts. i have not dove with them yet. but do you think i will see much of a difference in performance considering it is just the newest model.