The rampage is a pretty narrow fit, while the SPK is a pretty wide fit.  There is no way both of those boots can fit the same foot.  I have a Lange foot, and the rampage is a pretty good fit on me.
I somehow doubt the rampage truly fit you well.  Did you even ski it at all?  How a boot feels in a shop can be a completely different experience compared to skiing it on the hill.
What I'm getting at here is the continuing (retarded) trend of park skiers getting the SPK or Rampage ENTIRELY because they are marketed as a "park" boot, and NOT considering fit at all.  I don't care what boot it is, a boot that FITS will ski park WAY better than an SPK or Rampage that won't fit your foot to save your life.
Get off the bandwagon kids....