If I could interject something here, I think that growing up in the female role allows more freedom of gender expression during those years especially.  Maybe not.  But I think there are a lot of extrememly traumatizing "rights of passage" that are visited upon growing boys by older boys and adult males that damage anyone subjected to them, cis or otherwise.  So I think a FTM, in avoiding some of those experiences, can wind up more psychologically stable and emotionally well-grounded than the typical cis-male.  But maybe I'm overstating it.