I'm interested in understanding the differencs between the 712 & 716 MB, from a design standpoint.  The reason why I'm asking is because I continue to play the 712 MB, because as a 'sweeper' or 'picker' on mishits, the apparent sharper leading edge has been beneficial.  I'm curious if the general specs like bounce are the same, and if the pre-worn sole will be a detriment because of my tendency to hit shots thin.

Any help would be appreciated.