I have owned 2 busa's now to my 1 king, the busa are very nice and great bikes, but if I have to have one its the King for sure.
i am currently making my pumkin busa a cruiser, I just put on a zero gravity sport tourer windshield, 1 inch risers, buell pegs, and going to do a few other things just to make it my long distance runner- plus 500miles
So far I have done a 460 mile ride and a bunch of 300-400 mile rides on the king, but the wind does eventual get to you.
I cant say which one accelarates faster because it is not a level playing field- King has 17/45 gears, busa is stock,
Also I dont have a tre on either and am not worried about that, the King stops around 145 with the gearing I have its limited by rpm in 5th/6th by the computer/government/insurance agencies,lawyers
Comfort wise out of the box it is the King for sure, busa dont even compare, also if you get a King dont let friends ride it, they will want one.
Oh yea the King was in transformers
, so thats a big + in my book