WAR = PVP
WOW = PVE

That being said the "grind" isnt as big a factor in WAR as it is in WOW. I cant belive how much wow sucks you in and makes you grind factions be it bg's/arena/npc faction/raid faction in order to get loot. IN WAR there are 3 griding and that pretty much it your;

RANK - think of this as your level in wow
Renown (PVP)- think of this as honor but in a level system. the higher the rating the better gear you have access to buy with gold
Influence (PVE) - this can be considered faction griding but takes far less time and there is one ONE for each tier/chapter. husteling hard in PQ's can net a full bar after 3-4 PQ's. This in turn gets you 3 different items to pick on 3 different tiers.

So there you have it 3 levels or ranking to work on and lots of enemies to kill