Deluxe Edition
A deluxe edition is a premium hardcover printing of a comic, usually larger in page size, with better paper and added material such as sketches, scripts or commentary.
In depth
Publishers give their premium formats different names — deluxe, absolute, library, artist's edition — but the idea is the same: a hardcover, often oversized, sometimes in a slipcase, that presents a celebrated story with more care than the original printing. DC's Absolute editions are printed at a larger page size than standard comics; other lines reproduce the original art boards at full size.
What changes
Larger trim size, heavier paper, sometimes recoloured or restored art, and supplementary material: process sketches, scripts, introductions, cover galleries. The story itself is the same as in the trade paperback.
When it is worth it
For books bought for the art — dense, detailed or richly coloured work — a larger page is a real difference. For a story you simply want to read, the trade paperback holds the same comic.
Slipcases and printings
Some premium editions come in slipcases and limited printings; once sold out they can become expensive on the secondary market.
What it means today
Edition names are not standardised across publishers. Read the listing for trim size and what is collected rather than trusting the word "deluxe" alone.