The thing that makes 3ds max more difficult to learn than anim8or I think is all the clutter. They push everything in front of you at once before your ready. Anim8or being as limiting as it is inheritly makes it easier to learn because its interface more minimalistic. of course some things are made harder due to these same limitations. For example, cutting precise holes in things is usually a feature called boolean, something Anim8or lacks, so you have to do it manually.
This is what Ive heard anyway. I myself have yet to learn another 3d program and I think its because of this very reason.