There was something somewhat related i saw recently that male prisoners who identify as transgender are registered sex offenders at a rate of 21%, whereas other men at 15% https://t.co/CpPcmqMr5Z

I doubt we will get accurate statistics any time soon about this because of the stigma against naming transgender predators. From my own experience, it was really not too long after a TIM i knew announced he was trans and his eventual disgrace and removal from the bdsm business he created because of predator behavior. So, at least in that case the stigma or the abuse was more important than his identity.