That's not necessarily a relevant comparison since the goal of HRT in trans women is not simply to lower testosterone, but also to raise estrogen (and sometimes progesterone) to female levels.
Trans women on HRT are not hormonally like cis men (including men on ADT), so extrapolating any effect of sex hormone from cis men to trans women is going to lead you astray.
That's not necessarily a relevant comparison since the goal of HRT in trans women is not simply to lower testosterone, but also to raise estrogen (and sometimes progesterone) to female levels.
Trans women on HRT are not hormonally like cis men (including men on ADT), so extrapolating any effect of sex hormone from cis men to trans women is going to lead you astray.