Same continuity, different power levels. The IH Hulk version was severaly depowered by Banner's attempts to tamper his transformation and cure himself and finally by Stern's formula that indeed cured him, at least partially, it was more like a suppressor than a permanent cure. Like let's say an anti-estrogen medication, it will keep them at desired level, but under certain circumstances or external factors they will come back to previous level or even sky rocket to higher ones. The adrenaline rush caused by the imminent death from the chopper jump triggered the powers back but he was clearly less powerful than usual. The Avengers Hulk is clearly a different creature. This Banner can consciounscly transform at will, and has learned to live with his "curse". He retains a certain level of intelligence and recognize friend from foe, except when Loki's magic tampered him. Power-wise this Hulk is stronger than any movie version, I believe only the Ang Lee Hulk could match him maybe.