Being a Samsung fanboy I would go with the S8. The plus model is much better too. It is a little on the tall side but it's nice for reading through Twitter, Gbatemp, or any other forum feeds. Just too tall to pull down the notification panel with one hand. It has a one handed mode but I don't like using it. Good battery life though and very fast and responsive. Good quality camera too especially with mods if you're into that. And compatible with the gear vr (the newer model at least).
Just my opinion. I've never had an LG so I can't help you there. Hope I was of some help
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