Talking about the styles of brushes, not the actual brands, according to research, rotating brushes are slightly better than vibrating brushes but only a little bit, and require a more involved technique; but when used right, both are better than regular Modified Bass method.

Abu Tamim Ma’ad al-Mu’izz li-Din Allah

Absolutely, there’s a lot more to it than just the genitals, but to be fair, everyone has a large number of differences from the mean- I’ve met bio women with very deep voices, with unflattering figures, who’ve experienced misogyny, etc.

Apart from the genitals, everything a trans person had that might differentiate them from a cis person can still be present in a cis person.

Yes. Penis or vagina matters little to me.