Oris BCPD and Sinn owner here - of those two models I would vote Oris:
I’ve looked at these. They look bigger than my hand! Enormous! How do they wear? Are any of the functions useful?
The G-Shock Mudmasters are indeed big watches and certainly not for daily-wear. But for certain situations/occasions, their size is an asset in terms of legibility and extra robustness through cladding. As for features - there are various models of Mudmaster with differing feature sets - my particular model (GWG-1000-1A3) has a solid suite of functions that I personally find very useful.
I have a fully tegimented Sinn U1 and it is a terrific watch. However, as far as "the ultimate tool watch" - I would say my G-Shock Mudmaster is about as tough and toolish as it gets.
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