I recently bought a Dimarzio Norton to try in my Ibanez S. I read a dozen posts that described the Norton as a JB without the high mid spike. That isn't what I'm hearing at all.
The Norton reminds me of the Custom-Custom much more than the JB. The EQ curve of the Norton sounds almost identical to the Custom Custom, but the Norton has a much harder, stiffer quality to it than the CC. If you move it way away from the strings, that hard character softens a bit, but still not as soft and round as the Custom-Custom. The Norton's mids are very aggressive like the Custom-Custom.
I'm not really sure whether it will stay there or not. I have a Paf Pro in the neck which I refuse to move, and I'm not sure the Norton has enough of the same character to mesh well with it. I'm gonna keep messing with it though, Its an interesting pickup.