Femme boys vs Twinks

I've always been a primarily GG or TG guy. Going for girls with very voluptuous frames and well endowed both up and/or down. However, recently Infind myself more and more attracted to what I think are "femme males"...very thin, very girlie bodies...some with a nice A or B cup breast. Definitely the more girlie the better. So anyways, the question is this; What the difference? I see stuff in here with femme boys that look like girls, that I thought were Twinks...remember I said I like TG/GG's...the more girlie the more attracted I am to them.

So I'm considering opening up to dating a trans that doesn't have giant boobs...but are they trans(I know it's a mental and emotional state)? Is there a proper label for what I'd be looking for? Let's face it it hard to meet or date people without a proper label. Doesn't mean it has to be negative.