Having tried the gen out, what I can say is that the minute totalizer doesn't click over at 60 seconds like on the 7750, its a gradual turn. From what I cam make out, the rotor is shaped completely differently than the gen. Also, the date window edges are a lot deeper on the gen as well, to mask the recessed datewheel. The side shots on Kings site make the case look very fat, and I dont recall noticing that on the gen, but I could be wrong. All in all its a very nice piece though, a lot closer than I ever thought they would make this one!