Slammin, I have both: A P/J Elan, and a Spoiler, both fives. The Spoiler I retrofitted with Fatboys from the original AXY's.
Bear in mind that the Elan is all maple and ash, while the Spoiler is maple over mahogany with the purpleheart/maple center lam.
The P/J sound is very Fender-ish, no doubt aided by the Fender-ish woods I spec'd for my Elan deliberately. Yes the P is a lot louder than the J, but this is aggravated by Alembic's placement of the J backed right up to the bridge: The string is just not making much movement relative to the big sweet spot the P is sitting in. If I didn't have two preamps it would be very hard to reach any knd of blend. But it's a great rendition of a very recognizable tone. The P is very meaty, and the J is more tenor than baritone, but not thin-sounding. The blend is just what I like, that fat tone with the articulation on top.
The Spoiler with the FatBoys sounds to me like a MusicMan on steroids with way more definition. The AXY's are fine, but the FatBoys are just meatier. I always say the AXY's sound like a great studio mic, the FatBoys like an SM57 or 58: That tone is just built in.
But they both sound like Alembic: You're gonna hear everything unless you turn the tone/filters way down. With new strings, a great amp, a little treble dialed in, you can cut through anything!
J o e y