I find Warrior Knight a lot more shallow in regards to tactics when compared to AGoT, which is in my opinion the selling point of the game.
Similar Games to AGoT
Dune is excellent. If you want more information, check this out:
www.boardgamegeek.com/boardgame/121
There are also lots of files you can look at there too.
Best Regards
DTH
Starcraft is the closest game to AGoT in terms of game mechanics. Warrior Knights, while somewhat similar in theme - is nothing like AGoT in gameplay.
Dune, while being an awesome game, has nothing to do with the AGoT boardgame in any sort of manner.