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I am surprised. Some years ago, let's say 10 years ago, the Sub was a clear winner.
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I think 20 years ago the submariner would have won. Tastes have changed and the GMT has a little more soul; and offers a more everyday practicality. How often do Sub owners dive? Compared to GMT owners travelling??
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I think like with many Rolex watches the under appreciated ones are those that become “hot” decades later
Plus, Rolex has done much more to promote the GMT line than the Sub with the first ceramic being a GMT (LN), the Batman, and of course Pepsi. The Sub has gotten far less attention. This has brought much greater attention to the neo-vintage GMTs than the Subs.
both are gorgeous
but if I have to choose, then the GMT Master because of the slimmer case & dash of color 
If that was black bezel gmt, i might have gone for that. Else, sub. But it’s close really. Best to get both :-) (nt)
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Definitely Sub all the way
I’ve never got my head fully around regular use either a 24hr bezel or 12hr bezel as on my Oris. Practically speaking, the rotating 60 minutes bezel is something I use routinely when I cook or watch my kid’s sport.
GMT for sure... from a Pilots prespesctive! No hate on the sub, but you gotta pick one!!
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