Non F-Spaced pickup on Floyd Rose guitar?

SickBoy

Croatian Panzer division
Apr 9, 2004
2,061
1
36
46
Split, Croatia, Europe
www.myspace.com
I've been thinking about popping an SD JB-4 at the bridge position of my Kramer, but knowing there's a TremBucker version of the same pickup I wanted to ask is there an audible and worthwhile difference or is it more of another marketing issue? Yeah, I know there is a small difference in string spacing at the bridge between stop-tail and FR, but how much is it obvious in the real world?