What's the main difference between those two?
Really.
Well, the main reason why Im moving to Maya is that my 3ds max trial was lagging, my computer isnt bad, It can run GTA 4 quite well..and Maya doesnt lag.
And Maya is better for the animation, I like it more.The interface is quite comfortable, Max isnt bad software it is really good for modeling, but since I want to be an animator I go with Maya.
BUT The cursors in Maya are terrible,imo :D I really hate them, I have to get used to the :)
That was my opinion, but generally, it depends just on you, what you like more, you can create awesome animation/graphics with both.