I would believe that you are quicker on the WR. I think I would possibly be to. But for me it's not about racing or been quicker. It's the buzz I get from riding the bike. Jumping straight off a YZ450F and onto a KTM 450 xcw or the WR I am concerned I will feel flat due to the rather smooth power delivery and plush ride. I imagine I would just get used to this type of power delivery and adapt. No doubt these bikes are much easier in the trickier stuff. There is a happy medium here somewhere.
The day I got the WR home and rode it (right off the dealer floor) I was very disappointed in the power as it was about on par with the 250F I used to have minus the snap. After doing the free mods, and drilling out the baffles in the muffler (still free just not commonly associated with the normal free mods) the bike is a completely different animal. Still does not have the bark that the YZ did, but for me, speed is the thrill. Not actual mph, but knowing that I am pushing myself as much as I can for any given terrain. I just couldn't do that with the YZ most of the time because the suspension beat me up and the instant power tired me out quickly. It was more fun to fool around on though, I'll give it that.