Yeah, looks very much like 2 different SG's indeed, I too noticed the different woodgrain on both of 'em.The SG's... It seems like Adrian had 2 SG's by the time of World Piece tour. The woodgrains don't match at all and the 2nd one's pickups are much further apart. They probably both had Bigsbies at that point.
The first one is the one that H played again between 2005 and 2013 and AMLOAD videos. And they can both be seen in the guitar boat during DOD sessions.
Regarding the pups, do you have some info on how they might have been Jackson's in-house pickups (like, have you talked to some of the builders or perhaps H's or Dave's guitar techs at the time?) ?