klr 685 to Tiger 800
This would be a ditto, but I put the 685 kit in my KLR to fix the oil burning issues in the 08 model before selling it for an 800XC. I can see where he's coming from in some regards. In first and second gear, there's not a huge difference in power between the two considering the Tiger has considerably more CCs and horsepower.
But in the upper end of the powerband, there's really no comparison. I don't think I've ever redlined the Tiger above third gear because there was always a corner coming up and I didn't have the balls to stay on the throttle. I realize this is not a debate between the two bikes, but there are lots of us that made the KLR to Tiger switch, and I think it's a safe bet that few, if any, are switching back.