I recommend Fallen Enchantress with the expansion instead, better AI and more features. http://www.elementalgame.com/legendary-heroes
IGN gave Age of Wonders 7.1
IGN gave Fallen Enchantress 8.0
You're comparing games based on IGN's score? lawl But if you are really into such numbers, IGN was the only one reviewer to give it below 8.0. Here you go:
http://www.metacritic.com/game/pc/age-of-wonders-iii/critic-reviews
AoW3 is just amazing, great tactical combat, lots of abilities to both units and heroes, very distinctive classes, aggressive AI, great visuals and soundtrack, with even more content (races and classes) to come in the future. You won't be wrong with it if you have any interest in turn-based strategies, especially fantasy themed and focused on combat, exploration and expansion.