Better legroom to my opinion, but it could be just because of the handlebars are so different
The Bikes are not the same at handling and engine
The old Busa gets beating from both bikes
but the new Busa is best in unrestricted German highways
Since B-King has no fairing you really feel the wind
Also it seems to accelerate very quickly on 1st and 2nd but then...
well, you better test ride it yourself