problem is, the only boxers we've seen enter the ufc are second rate ones, has-beens and never-weres.
what you have here is one guy who is unbeatable standing up vs a guy who is a 'jack of all trades'.
the more money that becomes available in mma, the higher calibre athletes like a prime tyson you will see rise to the top.
at this time, you just don't have the lineage, experience and skills set to produce anything but second rate fighters ie tim mongoloid silva. i'm sorry but fighters like mike tyson was at his prime do not lose fights to the time silvas of the world. no way, no how. eg. how many trainers in mma have the experience and fighting wisdom of a cus d'amato or angelo dundee? same with the corners, the teams, everything is just a mixed salad thrown together to produce mongrels.
at this point in time, the talent is still with boxing. ufc is going to need a lot more time and money before you see finely honed talent like tyson, mayweather and roy jones emerge.
what exists right now is dana white and a circus of trailer trash, never weres and mongoloids. just a small group of nobodies that just keep fighting each other for chump change until they retire from old age. sorry, but anyone who thinks that is top level competition needs to get a new pipe.