With Vengeance you can choose the original route. As in the original game.
Or you can choose the new route that goes in a completely different direction. Fixes the story (as in, actually adding a deep story), pacing, new area, ect. Basically what the game should have been if they didn't run out of time.
The director outright states he pushed for this new version because he wasn't satified with the original
Rise from the dust and liberate mankind from the oppression of the corrupted gods.
Glide the sands of a timeless land, filled with ancient dangers, mysteries and fragments of the past. Hunt legendary monsters, using powerful, shape-shifting weapons and devastating sand-powered abilities in spectacular, super-powered combat.
Target and gather the essence of your enemies to shape your own custom playstyle, forging a new era for humanity in a fully cooperative or solo story campaign.
Rise from the dust. Unleash the storm.
Master the sands to explore a unique fantasy world teeming with secrets, locales and dangers
Hunt legendary creatures alone or with a friend in heroic, super-powered combat
Unleash your power to create deadly shape-shifting weapons
Rise as the ultimate champion with unique custom skills and abilities