Chamonix Mont Blanc wildlife

For some time now, I’ve been quite annoyed by the concerts and festivals scene. I’m tired of dealing with incompetent and condescendents. Instead, photographing the wildlife of the Alps is a much more pleasant activity. I live in Chamonix, here, if we look a little, we can easily find ibexes, deers, marmots, chamois and other mouflons. Keep your eyes open, be discreet, they’re right here.

Now I would like to buy a Nikon telephoto lens, I hesitate between the 200-400 f/4 VRII, and the 180-400/4E VR. Which one do you think is more appropriate?