A whole 7 or 8, eh?

Seriously, though, that is interesting. My experience so far is quite different.
With any given two across makes, models, and vintages, and irrespective of price, I have yet to hear two split coil P bass pickups that sound the same.
And if it's old Fender, then especially it's the luck of the draw: for example, two mid-1970s Precision pickups I have sound totally different; but two 1967 to 1969 Precision pickups I have sound very similar.
Yeah really, I can't remember if I've tested 7 or 8 or 12 different P pickups.
My favorite P pickup so far is the Aero Type 1 (very expensive!). I also like the Rio Grande Vintage P and of all the P pickups I've tried out, the Rio Grande has the best definition and clarity.
I have a real deal 1966 Fender P Bass, all original and it's pickup is very organic and "woody" sounding.
I'm embarrassed to say how many P Basses that I own. But my best sounding P bass is this one with the E/A and D/G coils reversed. It is a "build". The nickname is rightly so, "Reverso". The pickup is the S. Duncan SPB-1. The reversed coils are the way all P Basses should be. Reversed, the sound of E/A strings is tightened up and the sound of D/G strings is beefed up a bit. Giving a better balanced tone and sound.
Any given pickup is gonna sound different in every bass that it goes into. So, to say that X brand pickup is going to sound better than Y brand pickup is ignoring that every bass guitar resonates different and every bass guitar has it's own sound.
IMHO, I think that most of us are physiologically influenced by who made the pickup and how much it cost and we inadvertently judge the sound of our P Bass on those 2 factors.
The only true way to decide on a P pickup is by having one particular bass tested with multiple pickups with us listening and having our eyes blindfolded and not being told the brand or maker of the pickup..............while someone plays that one bass and we listen and decide which pickup sounds best. Not a likely scenario.
Anyway, choosing the best sounding P pickup is like the search for the Holy Grail. There is no end to it.
I recently read that Nordstrand has a computer controlled winder that can "scatter wind" every pickup identically. That's fantastic because a human hand scattered pickup is gonna be unique to any and all others and that means that each pickup one is gonna sound different.
Maybe we should just follow Frank Zappa's statement on one of his albums..............."Shut up and play your guitar
(bass)!"