There are of course many differences and things I have noticed. I will start with nutrition and follow up with more cultural differences from there.
They continuously add new flavors. My new favorites are the kinds with cereal and fruit combined. I have to admit I do miss my favorite greek yogurt at times, well we could get it here, but everything Greek is very expensive in Germany. Not sure if that has to do with the bailout. And then there is of course candy, but I am not an expert ;). I see there are a lot more kinds of gummy bears at our house. Since I mostly stick to the high gravity dark chocolate, the price difference isn't actually that big, since Lindt is sort of expensive here compared to everything else. There are just not that many companies that offer 85% + Cacao dark chocolate. I have enjoyed some of the cookies, including one of my favorites the " Prinzen Rolle".