AFAIK, Fender Wide Range's were discontinued because CuNiFe became unobtainium. They were reissued because there was a demand for that (previously satisfied by "Telenator" pickups).
And as it still appears to be unclear : a CuNiFe Wide Range doesn't sound like
most P.A.F. replicas.
Harmonics are objectively different because of how these PU's are sized. A useful tool to check it:
https://www.till.com/articles/PickupResponseDemo/
The roll off in high frequencies is similar for both PU's because of inductance although steeper with a WR... but
most Gibson style humbuckers are
louder, with more low mids and less strings separation.
That's why Wide Range and Les Paul emulations sound so different in Roland / Boss guitar modeling (well, granted, they've exagerated the difference... but they still managed to capture "something" of the real product in each case).
As I said elsewhere, one can get "close enough" IME/IMHO with an
underwound Gibson style HB. If it has a low inner capacitance, it's even better. But "close enough" doesn't mean identical. The most WR sounding P.A.F. replica that I've found is a boutique Dave Stephens VL1 - albeit it's still a tad less transparent than a WR with separate mag poles.
Regarding the idea that a neck PU musn't measure over 8.5k: what ACTUALLY counts is the number of TURNS and the measured inductance/stray capacitance of the coils, not AT ALL the DCR.
A Gibson style humbucker with 4542 turns of wire per bobbin will measure 7.50k if it's wound with AWG42
but 9.22k if it's wound with 43AWG. For a same number of turns, a same inductance. Only parasitic capacitance should rise a bit with the thinner wire. But the sound will be practically the same.
Another educational link :
https://www.mylespaul.com/threads/th...-coils.369099/
Enough said: nothing is worth direct experience, anyway.