I ride with a guy who has the Bearcat 660 non-turbo. I have a 2008 VK like yours. There is no comparison in acceleration and top-end speed. However, he cleans up in the handling and manuverability. The 660T engine is very quick in a standard sled so if I had to guess, I would say that a Bearcat turbo would outperform the VK primarily due to the oversize secondary clutch in the Cat. This clutch eliminates the need to shift from low to high range so there would be an advantage at the start. The Bearcat is about 30 pounds lighter. Top speed and midrange would be about the same. Pulling power would go to the VK. Handling and ride comfort would go to the Bearcat. Both are great utility machines.