Honor 9 or LG G6 (Germany)?

I can get both of these phones for roughly 400 €, so the price doesn't matter to me. Regarding the LG G6, I'd be buying the Korean version, since I absolutely need dual-SIM.

Other aspects I care about (which are hard to assess online) are build quality, longevity (2 years before it starts majorly lagging would be nice), screen quality, and the camera.

I know of all the technical differences between the devices, but what I really need to know is more subjective experiences and perhaps some info on which company you would trust more? Also, which one do you feel has nicer accessories (cases) available?

I will mostly be using the device for reddit, Video streaming, surfing the web, and organization (E-Mail, calendar, etc.). I don't game at all, but I do take pictures every now and then.

Last thing to add, I would be able to stretch by budget to 500 € for a OnePlus 5, but only if you really feel it is worth it.

Thank you!

I also made a strawpoll, but please only provide an answer if you have an honest one.