I think it's often a grey area whether a girl is 'genuinely Trans', or 'merely' a CD.
For me, things I'm looking for in a TS are: her own (hopefully long) hair, smooth all over, feminine voice, feminine demeanour, breasts (implants or otherwise). If she's on hormones too then this tends to assist in all of those. The Holy Grail for me though, is hormone-induced breasts, even if they are small. They'll also tend to have puffy nipples which is liable to render me slightly
.
A CD is essentially a gay guy in a frock. Might have own long hair, might shave/wax smooth all over but is liable to have slight chin stubble (which can ruin the illusion somewhat
). They might even be very feminine and with a soft feminine voice. But there'll be no tits, and if they have a wig too and pancake make-up, I'm finding it harder to...erm...get hard.