I brought in some less biased ears. Baby brother joined me for some taste testing. He likes the P a lot more than the J because "it sounds like he put a pair of
Invalid Link Removed in that pickup!" He's the one who looooves some low end. (Strangely, his specialty is guitar!) Either way, he dug it.
Something I realized listening through the amp that I wouldn't with the DP127-my strings are slightly dead. The pickup was clear enough I could tell I was missing a little bell shimmer on top of the sound. I turned down the amp, listened to the bass unplugged, and whaddayaknow, it was! (I know, it could be that the pickup was unable to reproduce that high end that the strings weren't producing at the same time, but the J's pick it up super clearly, so I'll give the benefit of a doubt.

)
Moving on, the big thing with the (B4) J is clarity. It is there! I hear every little buzz, clack, and mistake I make. The high end has come to life, and with it, a little extra potential for aggressiveness in the bass. I like that. Tone rolled off, it really takes you back 40 years. Sean said that it really cops an old SCPB vibe when I played the line to Night Club by the Specials on the neck PU. The bridge can HONK and I loooooooooove it for that. I like to have some versatility in my J's, and these pickups just filled out exactly what I wanted from the basses. I haven't hit the J's for slap yet, but I think with some light gauge strings for comfort, these would be Flea-funk machines.
Thanks John!
/End honeymoon period impressions.
PS- Samples will come ASAP. I need to set up the P for playing B standard to match the other samples (maybe with new Drop Zones) and restring the J with Drop Zones. Problem is that $30 strings aren't in the budget yet with a $50 parking ticket yesterday and my band owing me $50 each for our management payment from last week. :/