Only rule is - do NOT enter IF you already have Blackguards game.

The difference between Blackguards and Blackguards Deluxe Edition is following - it has extra Artbook with ~150 pages, Soundtrack, digital World Map, Developer Interview Videos and 6 Exclusive Wallpapers.
Main part of the Deluxe Edition is still Blackguards game.

I will ask for a reroll if you already have Blackguards in your library.