PRAGUE!! Vienna is a lovely city but much more like a generic big Euro city (e.g., Paris). Prague, to me, is much more special because there are so many things- like incredible art noveau architecture- that are unique to it.

Prague is unique. Thanks to the unfortunate handing over of Czechoslovakia to Hitler by Chamberlain it became the only major city in Central Europe that has maintained it's ancient historic architecture through WWII.

The city is also much livelier and has an incredibly diverse - and quite inexpensive - music scene - of all types.

Vienna is a beautiful, traditional, imperial city - but to me lacks most of the youthfulness and liveliness of Prague.

It's funny you would say Vienna "lacks youthfulness" as I thought the opposite -- on a cold winter Saturday afternoon in St. Stephens, I saw THOUSANDS of young families and young people shopping and sightseeing in a very lively atmosphere. At first I thought they were all streaming to some concert, but everyone was just strolling around in an unhurried way. And in Krakow I mused that Prague was positively geriatric in comparison; that city is run by good-looking young people.

Wine, food, cafes = Vienna. But you really cannot make a *wrong* decision.