The Danube Hilton must be new or a recent takeover, as it was not there this past spring. Anyone have info on this?

I stayed at the Plaza Hilton in May and it was very nice. It's definately smaller and much newer than the Vienna Hilton. Service was very good, upgraded to business floor as a Gold, has a great rooftop lounge with a nice view over the 'ring strasse. While I was living in Vienna from Aug.-Dec. I didn't have a chance to visit the Vienna Hilton, but from FT I've heard nothing but good comments. Both hotels are well situated within easy walking distance of the entire inner city. Like World20 said the older Hilton is right next to the bus terminal so it has easier airport connections, although it's only a $5 cab ride between the 2 hotels.

I haven't seen or heard of the Danube hotel until now, so I can't comment on it. All I can say is that I wouldn't recommend it due to its location, unless it's an amazing hotel with super cheapo rates or something.

Bottom line: if you want a newer, smaller hotel (I did) then the Plaza is worth the 15k extra.