Definitely the LG Urbane, but it's because of how I use it. If you need full call, text and email capabilities, then go for the Samsung. Which is Tizen OS.
If you're more interested in a broad array of searches, navigation, calls, texts - then I'd go Urbane. Which is Android OS.
Other have their quirks, but I hate that the samsungs mapping is terrible and that it does not have good search feature on the watch. S-voice is terrible, but Google search is very good.
Conversely, samsung has better menu layout, emailing and text inbox viewing. And they have a good feature with the turnable wheel for scrolling, selecting.
I'd go play with them both or watch a few videos to decide.
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