"The main improvement of Anniversary Release over the normal version of War of the Ring Second Edition is that all figures are hand-painted to a very good quality standard.
We will also include two beautiful hardcover volumes, in a slipcase, graced by full-color art by John Howe: the 2nd Edition Rulebook and the War of the Ring Companion, written by Kristofer Bengtsson.
Action Dice (16 dice) and Combat Dice (two sets with 5 dice each) will be produced in new colors, unique to this version.
On top of that, we will provide larger game boards (for a total playing area about 3' x 4') and improved reference sheets on special cardstock. Counters and cards will be the same as those included in War of the Ring 2nd Edition, to ensure full compatibility with the regular version of War of the Ring 2nd Edition and its expansions (Lords of Middle-earth regular and limited edition; the upcoming Warriors of Middle-earth).
Rulebook and cards will be updated to reflect the most current FAQ and Errata at the time of printing.
A numbered certificate of authenticity will be included with each copy."
Source: Ares Games website
Not to confuse with the Anniversary Release Deluxe Set (Game Rules, Companion and Gameboard Only).