I think the difference between me and a CD is, in my mind I don't have the desire to dress fully as a woman to feel complete. I do enjoy some aspects of woman's clothing but have no desire to dress completely and present that way.
I'm exactly the same. I'm not a crossdresser. I feel complete as I am, although I do push some boundaries at home every now and then. I'm even starting to deliberately shop for clothing that is, although unisex, based off typical female designs and I'm happy to wear that sort of stuff in public. But dresses or high heels etc.? NO WAY! I also don't even shave my legs or chest. Another factor that sets me apart from being 'just' a crossdresser is my comfort with my given masculine name.
A transwoman, as a woman, absolutely needs to come up with a feminine name. A crossdresser, as a female impersonator, also needs to come up with a feminine name in order to align with their appearance. Me, who started out as a boy experimenting with bras and panties and happened to grow some moobs which I welcome, isn't trying to impersonate anyone. I'm just being me, wearing items that suit my body, heart, mind and soul, and I'm happy to keep my given masculine name along with my hairy legs and chest, no matter how pretty my hair and nails are or how dainty and smooth the fabric is of the stuff I wear against my body.
Sorry if I've just blurred this thread and the 'transgender but not transitioning' one, but I think the reference to CD's is relevant.