there is a great technical section on their website where you can compare and contrast balls.  You can do it in the bowling ball section, where they show you lines the ball would play, or in their technical section where they break it down by bar graph.

That being said, the buzz goes marginally longer, the WCR is slightly more angular, the real difference is the WCR cover is significantly stronger, so where the Buzz is a light condition ball, the WCR is a medium ball than can play a touch of medium-heavy.  According the lanemasters, the WCR will hook probably in the neighborhood of 35% more.  Of course, that is lane condition specific, on dry conditions, it will roll out and not hook as much as the buzz, but it will kick the Buzz's butt on medium.  That being said, I have found the WCR very resistent to rolling out and plays dry much better than my satisfaxion, and it takes toasted conditions to make it over-react.  Very solid, very controllable ball.  I found the ball was versitile enough that when it struggles on drier, I can go right to the straight flush, so you will have some overlap of abilities.  ( a good thing IMO)