I couldn't believe how fast the fight was over. They practically showed everything in that clip before the movie was released. I guess I understand from a story point how the Upgrade was supposed to be stronger, but it was over before it even began.
AvP has the best fight scene between two creatures as far as these movies are concerned. It was long, had some suspense, and had a surprise ending to it. At least I was surprised by it when I first saw it.