Re: Gibson 1961 - 62
I'll try my best to do this...this is my take on the whole thing...
Gibson was not very picky about somethings in the old days...pickups were one of them. This means that ALL PAF's sound different from another...I have heard that both alnico II and V magnets were used in PAF's as well as Alnico III magnets in a few pair...BTW Seymour Did a great article for Vintage Guitar a few years ago aobut PAF's...if you can, I recomend reading it.
On to the pickups...
A 59 is made just like Gibson made the earliest humbucking pickups...they sound like it too. The enameled wire, nickel-plated studs, balanced coil windings are all things that the late 50's PAF pickups had in common.
A Seth Lover pickup is made almost exactly like Mr. Lovers original drawings showed...this changes the tone just a bit...slightly less output (I mean SLIGHTLY), a tiny bit more midrange. Nickel silver bottom plate, butyrate plastic bobbins; plain enamel wire, an Alnico bar magnet, and a nickel silver cover instead of brass (which magnetically eliminates too much of the pickup's natural high-end tone) are things that make up this pickups sound.
Both the 59 and Seth have a killer PAF tone and vibe, I have found the Seth to bit a bit more mellow, thats not saying that a 59 is not a very smooth sound. Both of these pickups are great and for most applications, either would do the same great job a real set of PAF's would do...for a LOT less money!
Antiquity's
This is what a set of 50's PAF will sound like TODAY, after they are 50 years old...Very mellow, very warm, they are hand made by Seymour and MJ (which IMO opinion adds to the mojo...not to mention the tone!). They also look 50 years old.
If you were going for killer rock-n-roll, I'd suggest a set of 59's, if you wanted a great smooth clean tone that would fair very well in crunch situations, get a set of Seth's, if you have the extra money to spend and want the tone that a 59 Les Paul is gonna give you TODAY...not the sound it would have given you in 1959, get a set of Antiquity's.
I hope this helped a little bit.
The guy who invented fire