To answer your question, yes the subdial spacing is the same. However, the dial diameter will need to be thinned as it won't fit properly in a 7750 case. Don't cut the feet off the dial, just get a Noob SA4130 watch and swap dials. This way, you still retain the value of the gen dial.
Gen dial on a A7750 is "putting lipstick on a pig" lol.