Before getting into details on either hull I want to point out that the stunt and the BOB were really the first aftermarket hulls to be affordable by your average rider. This time last year, the stunt was the only hull below about $5k-$6k. Then shortly afterwards the BOB came out. The BOB cost a little more but had better customer service and build quality. Now there are countless hulls under $5k and the choices are much greater. It's kind of like buying a big bore engine and then a couple months later you find out you could've had an even bigger engine for only a little more. You'd get all googly eyed for more power and you'd seriously consider the new engine.
I want to say that I like my stunt hull but it took some serious effort to get it to ride like a normal boat. I'm NOT considering selling mine so consider me a happy short boat rider. There is a delicate weight balance on such small boats. So if the original owner doesn't have the patience to set it up, they most likely will not like it. Patience for fine tuning got thin for most stunt owners as cleaning up the pathetic build quality was priority number 1. My hull has excellent slow speed control but gets very squirrelly at higher speeds.
As for the BOB hulls... I've ridden the first and second generations. Both had excellent build quality and from what I hear from the owner, customer service was second to none. The problem with the BOB was it's very much a purpose built hull meant for backflipping. That purpose built concept creates a major problem if you just want to mess around on the water on your day off. Recreational riding on the shorter hulls is much harder. I thought slow speed on the BOB was very unstable but at mid to high speed it was more controllable making wake jumping difficult without plowing through the wake.
On a side note, I thought the footholds in both hulls were total crap. I could talk both positively and negatively about both hulls for quite a while but I think the above information is the basic, no BS, information requested. If you'd like me to clarify on anything or want more information, just ask.