In general you can determine how much output a pickup has by it's resistance.

But how close can you really get? Couldnt two pickups both with a dcr of 16kohms have a substantially different output depending on the gauge of wire they use and the geometry of the magnetic system?

Washburn X50PRO FE (GuitarHeads active bridge pickup)
Dean Vendetta XM
Jet City JCA20H head, w Eminence Texas Heat 12"
Danelectro Transparent Overdrive
Ibanez TS7
DigiTech RP-255
Behringer VD1 (Big Muff PI clone)
For the most part, the greater the resistance, the more powerful the pickup but you are right, it is subject to change depending on the design (not much change though). The I'd say that's a pretty good rule to follow and any changes would probably be negligible. Unless you travel into the world of active pickups... I don't know anything about those...

16KΩ?? Thats huge!! What pickup are you looking at?
the magnet type, wire gauge, and dc resistance all effect it to a certain degree.

after about 16k though you'll see less difference.

my 22k pickups aren't that much hotter then my 16k pickups.
Jumping on dat gear sig train.
PRS Hollowbody II / BKP Warpigs
Strandberg OS6T / BKP Aftermath
Strandberg OS7 / Lace Poopsticks
Skervesen Raptor 7FF / BKP Warpigs
Skervesen Raptor 6 NTB / BKP Juggernauts
Hapas Sludge 7 FF / Hapas Leviathan
Anderson Baritom / Motorcity Nuke BKP Sinner Anderson H2+
Warmoth Baritone / BKP Piledriver
Ibanez Rg2120x / BKP Nailbomb

Blackstar ID:Core Beam