It is indeed one and the same building. Following is a post I made to the M-List late last year:
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See the link below regarding the recent exhibit at the historic
Messehallen in Munich:
http://www.deutsches-museum.de/presse/presse-2008/messehallenThe exhibit 'Bavaria-Dampftopf, Mahlers Achte und die Mondrakete'
highlighted the use of the exhibition halls over the past 100 years:
"The changeable utilization of the Halls runs from the first
exhibit "Munich 1908" through the world premiere of Mahler's Eighth
Symphony to use as a grain warehouse in wartime or for the Eucharistic
World Congress in the 1960s"...
[Die wechselvolle Nutzung der Hallen reicht von der ersten
Ausstellung „München 1908“ über die Uraufführung von Mahlers Achter
Symphonie bis zum Haferlager in Kriegszeiten oder dem Eucharistischen
Weltkongress in den 1960er Jahren"]
I don't suppose the Deutsches-Museum would be willing to pull out the
transport exhibits for a 100th anniversary performance in September 2010?
Mike Bosworth
Hanoi