John; according to Christian's post, his bass has the following: Fat Boy Bridge pickup, MXY neck pickup. While the shells are different sizes, the AXY's, as in your Spoiler, and the MXY should sound the same, as they have the same size magnet. However the Fat Boy has a wider magnet (wider along the length of the string) and thus will sound different from an AXY. The tone of the Fat Boy will have more growl.