>>41585008 (OP)
Asians clearly have a massive advantage when it comes to mtf transitions. It is basically cheating.
Whites and blacks probably have it the worst (assuming no blockers, obviously).
I think Latinos have the biggest advantage when it comes to ftms. I have never seen a Latino ftm that did not pass super well.
Asian ftms probably have the most difficulty passing. But I have seen a few Asian ftm femboys that were able to make it work.