Both the females and the males from Crowntail lines have the crowntail. Males still have longer fins, but it's not nearly as pronounced as in the half-moon lines. That is, female crowntails have almost equal finnage to crowntail mails.
They are still bettas, and they will still be aggressive and territorial given each individual fish's personality. I haven't heard of off-hand rule that says crowns are less agressive in relation to other bettas, so I imagine your chances of sucessfully getting one to live in a community tank are about the same as any other betta.