I prefer the corbin. I know the mustang os softer bit jist like a firm bed it's supposed to be the same. My hus and bought me a corbin 1 piece for my aero and I love it. Plus the corbin os leather and mustang os notI prefer the aero type for my wife. I need to look for a Mustang Seat and a back support for her
Not sure if it's the angle, but that seat DOES look odd. The driver portion is wider, and the passenger portion is more narrow, than a stock seat. Looking at it further, the mounting bolts don't appear to be in the correct spot, either. That seat may be modded and recovered, or may be off an entirely different bike. I have an 02 Spirit and can provide pics and measurements of seat if you want to compare to stock.