I'd never heard of 'circumgender', so googled and found this 
A trans woman is anyone who feels like they've transitioned in any way to womanhood! The term is open to anyone who chooses to self-identify as a trans woman. The fact that I don't have a "typical" history of transition doesn't mean I shouldn't have access to, for instance, electrolysis for my chin hair, which causes me significant distress.
To be a trans woman is to feel like in your life you've undergone significant changes to how you present your own femininity and what it means for you to be a woman. This change doesn't have to be surgery, hormones, et cetera. A trans woman doesn't need to have been born with a penis, and to say otherwise is the kind of biological determinism I really thought we'd gotten past as feminists.
And
When you see a circumgender trans person blowing off steam toward a ciscumgender trans person (i.e. some of those famous images of circumgender women holding up signs or emblazoned with tattoos reading "die ciscumgender trans scum"), keep in mind that the circumgender trans woman isn't the privileged person here, the ciscumgender trans person is.
Additionally, it has come to my attention that CERTs (Circumgender Exclusionary Radical Transactivists) object to the use of the term "ciscumgender" in the circumgender community. But to just refer to this privileged class of trans people as "non-circumgender" is to refuse to acknowledge their relative level of privilege and to make circumgender forever seem like the outcast, the outlier.
And
You can also make sure that circumgender women are centered at trans events. The violence suffered by ciscumgender trans women is often put at the front and center of violence against transgender people movements, to the detriment of circumgender people.

All from here
www.reddit.com/r/Gender_Critical/comments/36qrsl/i_am_an_afab_circumgender_trans_woman_ama/