I don’t have the Fit-On M Gold profile numbers in our database, but I do have the Fit-On Max 56 gram and my guess is they are similar. If they are, the Kuro Kage Black HBP 50 and the Fit-On Max 56 are almost identical in their frequency profile. Those two should produce very similar ball flight results. the HBP, being slightly counter balanced, might feel a little different, but it might not. No way to know for sure without comparing side by side.