Sony Xperia XZ3 or Samsung Galaxy S9+: which one would you buy?

Sony's latest and greatest phone is noteworthy for a couple of reasons. For one, it's the first Sony flagship to have an AMOLED screen, instead of an LCD one. Secondly, it's curved to the sides — a feature that's rarely found on phones other than Samsung's.
So, naturally, someone might draw comparisons between the XZ3 and Galaxy S9+. But, in reality, these are two very different beasts. Sammy's software is laid thick on top of Android, while Sony takes the “light reskin” approach. The S9+ has a dual camera, while the XZ3 still passed on that feature (though, the XZ2 Premium that launched earlier has it).
So, which one would you buy?
So, naturally, someone might draw comparisons between the XZ3 and Galaxy S9+. But, in reality, these are two very different beasts. Sammy's software is laid thick on top of Android, while Sony takes the “light reskin” approach. The S9+ has a dual camera, while the XZ3 still passed on that feature (though, the XZ2 Premium that launched earlier has it).
The Xperia XZ3 launches for $900 this September. That's around the same price Samsung asked for the S9+ back in March, though, you can get it for $800-something nowadays, or less if you hit a sweet deal.
So, which one would you buy?
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