This question probably concerns not a trip in the next few months, but a future trip to Europe. However, two cities that we considered visiting--and probably cannot because of distance--are Berlin and Vienna.
But my sense is that Vienna with its cleanliness and classical music and slower pace appeals to the older travelers whereas Berlin with its more diverse nightlife and social and economic vigor appeals to the younger travelers.
Perhaps the question is unfairly simplistic or the answer rather obvious, but am I correct in saying that the extent of the appeal of these two different cities is--as a general statement--dependent on traveler age. That is, younger people will gravitate to Berlin and the older will appreciate more Vienna.