No one, and I mean NO ONE, can answer your question as asked. We don't know what your use cases are, what you use your phone for, what features are most important. For example, do you frequently run out of battery before the end of the day? Then a replaceable battery might be really important to you. Or do you have wireless chargers already in place everywhere you spend time? Then the fact that the LG doesn't offer that may make it a non-starter. Do you do swimming pool maintenance? Waterproofing matters. Asking what phone I think is best is irrelevant if my needs and usage patterns are completely different than yours.
Now that I've gotten used to a 5.5" screen, I think I'd find the S7 too small. The S7 edge looks interesting, though. But you might prefer a smaller phone. Like I said, what I like isn't necessarily relevant to what you need.
My suggestions:
1. Make a list of what you really like and dislike about your current phones.
2. Make a list of what features you wish your phones had.
3. Wait until there are real reviews of the phones published. Make decisions based on real information, not the hype that comes out of these product announcements.
4. Compare your lists of likes / dislikes / wants and needs to the features and performance of the phones, and decide for yourself which better meets YOUR needs. Then do the same with other available phones. You might find neither of these phones is best for you. Just because they're the newest doesn't mean they're the best.
5. Wait until the units are in the hands of real users for a few weeks, and see what issues arise that reviewers didn't notice, or didn't tell you about.
Finally. Make up your own mind. Don't let us decide what's best for you.