If you give TMM a call, they can schedule a walkthrough over the phone with you and explain everything. It's a full-featured system that's well thought out.

If it were me and I were choosing between CARMA and MAS, there would be no question; I'd choose MAS simply because it's a very mature and stable product, has a HUGE installed base (which I don't think is the case for CARMA) and I think you'll find universal agreement that Mansion's service and support is second to none.

One other thing you might consider is going with a custom CMS. For the kind of money you'll spend with either, you could have something written... but you would do best to find a coder that has experience doing CMS, preferably for the adult industry.