Well, it depends on which part of Germany you're from. People from the south, especially Bavaria, will find less differences than people from the centre or north.
I am from the centre west and I like to think of them as a slightly more orderly, slightly more traditional and conservative Bavaria with a dialect I more often than not struggle to understand with ease. It also seems to me that Austrians have a more relaxed approach to life in general, more orderly yes but first and foremost less stiff. It's hard to explain.