Quoted from Coindork:To be fair Stern marketed these as Pro - Premium and Luci, so it sort of makes it look like there are 3 different tiers (although its just the trim and how the machine is skinned)
https://sternpinball.com/game/ac-dc/
There was originally a pro/prem/LE with two version of the LE - Back in Black (BIBLE) and Let Their be Rock (LTBRLE). Later but before the vault they did a run of Luci prems which had different cabinet art but was still a prem. That version of "Luci" probably didn't sell as well as the initial version since the game had been out for a while and the art was polarizing. However, later it went through a phase that they were considered more rare and some where willing to pay a premium for the Luci version of the art, but they were never an LE at least as Stern markets them and they later proved that by making more.
Later there was a vault edition (linked on the stern Website) which initially was only the art from the initial pro and prem with a few changes (e.g. it no longer included the drummer, the playfield art on the pro didn't have the face, and the plastic over the lower playfield was screwed in from above, and metal speaker panel). A later VE run (this game) they did premiums with the Luci cabinet art and backglass are which made those less rare than they previously were. Since ACDC is no longer being produced the number of games is "limited" to the number of existing games, but I would only consider the BIBLE and LTBRLE the LE versions of this game.