I've only used the Fralin splits and I think they sound great compared to the stock Fender pups (MIM Jazz). +5% overwind so a bit more "dark" but great for fingerstyle with the brighter EB Cobalt flats. I'm curious about the SD Apollos as well but probably won't be switching anytime soon. Time for another bass? .... <he looks askance at the wife and contemplates another purchase> ....