Mostly, when you crash it's easier to just replace a tube than the whole clip-on. More adjustability too. Some have slightly bar angle.
they are better because if you fall down you bust a little $10 tube that you can buy at the track or take with you and if you bust a stock one you have to replace the whole thing. Other than that it is pretty much the same, although you can move the clip on posts around a little, but I wouldn't consider that too mcuh of an advantage.
Actually, the adjustability is an advantage. Stock bars press into my hands and cause numbness. By using clip ons on both my street and race machines, I was able to alleviate this problem and ride with greater comfort and control.
interesting. I would have to see that in action so I could tell the difference between them. For me they have always been the same size around and pretty close to the stock location. I would even run them mix match and it wouldn't matter. different strokes I guess.
