Sorry, not keen on either of them, but then I prefer (and own) Brietling every time. Most accurate timepiece I've ever had is my B1. Accurate to within +/- 1 second per year. At UK prices they're about $4,500.

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Me:
Current: 2011 E71 40D Vermilion Red/Beige Nappa

Wifey:
Current: 2012 R80 Countryman SDX Green/Cream