The biggest reason is the steering levers. They orient almost vertically, whereas the Sideshow bike has them swept way back. I wish they were adjustable.
Not only they are swept back. The handle bars are totaly way way off. You can see on the screen cap, the intersection (triangular shape) where the handle bar and the support meets. Its mid way up away from the bend. As on the Sideshow version, its near the bend. For me this is a must to fix (or scratch build it. While I'm at it, fix those foot pedal support as well). I thought my bike will be on display, but I guessed it will be on my workbench.