I think whether you go to MK or AK depends on what you are looking for in a park
If you are looking for thrills and rides mostly, go to MK. It is like a fantasy world and there are tons of things keep you occupied.
If you are looking for more quiet and more of a learning experience, with less rider, go to AK.
Its kinda hard to compare AK & MK since they have two seperate themes and things to do
But if had to pick one or the other for one day, it would be MK.
Of course I like every park and try to hit 'em all if time permits!