Opinions- Lange Moonphase v. 3137

I just purchased the Lange Moonphase, in platinum, with the clasp but then I thought about my 1st love, the Breguet 3137 in white gold. I was offered a great deal by an authorized dealer for either watch so price is not an issue and he will swap the watch as long as it's unworn. I only have 1 week to decide. This will probably be my "last watch" so opionions are valued! I am also posting this message on the Lange site to get a fair cross-section of opinions.
Again, thank you for your opinions.

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