I lean towards the loaded AB, over the Z just because the weight difference can be significant.
I’ve never experienced the Z or prima, and I’m sure they are amazing. The average weight of the Z’s seems to be a few pounds higher than the AB. That’s probably the bigger body and premium woods.
I also like the more compact AB body, and the sweeping curve from upper to lower horn. The chambered AB 2 with f hole is super cool.
My idea of “loaded” at this point, is fancy paint and lots of Luminlay, and maybe if I asked “pretty please, with lots of cash on top” an ebony fretboard. I’d let the paint shop loose on a metallic flake, candy and ghost flames hot rod extreme theme. Matching headstock paint.
Passive, and keep it close to 7 lb, even if it means two pickups rather than three. Super fatty bridge, split P in the sweet spot. I’d expect a upcharge to route in that option, but I’d be fine with a standard P in the neck. I like the hybrid tone thing. A four string. Detuner on the E.
I played this game lots of times over the past fifteen years. My fantasy Dingwall. And it keeps changing, always getting more simple.