My Dad has had a Bird for a couple of years and thought I was stupid for buying a Busa. It depends what you're looking for I guess. The bird is a bit more smooth and comfortable and much more comfy for a passenger. He's done some small mods. The usual, pipe, PC, sprocket. He'll beat me up on my Busa all day long. (He is a much better rider) ( I have bolt ons, nothing else) I struggled with the same question you have myself for many months. Here's what it came down to for me: Birds a bit more comfy, Busa's a bit more powerful. I just liked the looks of the Busa better. If I would have liked the looks of the Bird better I would have bought that. Plus there's a lot more appearance mods you can do to the Busa. There's somebody on here who has both, if I come across them I'll let you know who it is. Good luck!!!