I have 3 now. 2 are deff 750 frames but they are a little different. One has bolts that hold the tank bumpers and the other does not have any bolts, they just glue on. The sub frames are slightly different too. One has more bolt holes and brackets.
The other frame I do not know if it is a 750 or 1100 frame. There are no Vin numbers on the head tube and they have not been removed.