People rave about Wizz Premium Clones, but they've been bright, thin and flat sounding in every guitar I've tried them in. This involved much tweaking and several guitars.
I've no horse in the race (no Wizz in my guitars) but most boutique P.A.F. clones I've tried were/are bright... just like real ones. And the ones in my main LP, built with NOS parts, can be super bright too if I want.
IME, such pickups need a vintage context to shine: vintage braided shielded wiring in the guitar, vintage long and/or coily cables from instrument to first host, primitive pedals with poor buffers like a vintage wah... Parasitic capacitance has to be high, input impedance is better to be low somewhere in the sonic chain.
Plug all that in a cranked non master volume amp and it sounds glorious.
But if one puts a P.A.F. replica in a guitar wired with low capacitance Mogami and plugged through 10' of VanDamme, the sound will probably be ear piercingly bright.
Mainstream contemporary P.A.F. clones are often voiced for modern gear, IOW bassier / darker than in the past. Gibson even puts highly capacitive braided shielded wire on vintage style models and give 'em a lower Q factor by design, in order to make 'em less bright out of the box...
I suppose what I'm trying to recall in all this rambling is that
passive pickups have no defined sound by themselves. ;-)
The first fender noiseless strat pups i remember not liking. And DiMarzio Area strat pups those just sounded like poo....i remember replacing the whole guard with a Squier affinity loaded guard and thinking it was a vast improvement.
The response of many noiseless stacks suffers of a "camel syndrome": they produce a dual resonance, scooping the audio spectrum just right where a real single coil would focus its energy in a pointy narrow resonant peak... Reason why even models with non symmetrical coils like the Area's alter the response to high harmonics.
There are various ways to avoid that but pickups designers often seemed to ignore the problem as well as its solutions... until Fender launched their gen4 noiseless pickups, whose resonant peak is finally like the one of a real SC (proof that it's doable).
