I find the Rampage to be more agressive than the Smokin' in box finish with a similar drilling.  The pk 18 is more than the activator andvance.  The advance is a very clean cover.  The vapor is an earlier and more even ball than the Rampage, and still may offer less overall hook as the reaction is less skid snap.  I would anticipate that on certain conditions the overall hook of the Vapor would be greater than the Rampage.  If you want a skid snap reaction out of any of the asyms. you'd best look elsewhere.  I have drilled three, the classic, impulse, and strike, and I have seen many thrown, and have yet to see skid snap.  One can regulate the length that the ball travels down the lane and the backend that the ball provides, but the asyms. are still low rg pieces.  I personally believe that their strong arcing nature (in addition to their great # of drilling possibilities) is why they are preferred, in most instances, by pros on the tough sport shots of the PBA tour.