Ue630x launched in mid 2015.

Hisense bought over sharp USA, the plant in mexico.

Foxconn bought over rest of sharp.

I read the new sharp model in USA is actually hisense, non-androidtv, 4k hdr.

Have not read or seen anything in the local shops new since foxconn acquisition.

A new model should hv a new model or series no., unlikely to be same.

Foxconn had said they will "leave the sharp biz alone". So, for a while at least, biz as usual.
I do no think there is any new model since.
But like anything else, the ue630x probably were made in batches, with some in 2016 or even 2017, i would think.
How to check that, i hv no idea.
One thing u can check is the android version.
Older ones will still have 5.1 while newer should have 6.0 or 6.1.

My unit is 1 yr 8 months now, 5.1, enjoying it thoroughly.

What is this lgu model? A new sharp 4k hdr?
If price is comparable, getting it with a good adroidbox is worth considering.
Esp if u do a lot of playback with big files, high quality for video and audio.
The ue630x usb playback function is not very good.

u mentioned it's for parents' use.

for anyone's use, the TV is not an issue.

using the androidTV or the androidbox can be any issue.

both ain't easy for older folks unless they already now/use PC/tablets a lot.

a box may be a little easier in terms of flexibility and capability.

more so if u want to go for ahem iptv.

androidTV is neater, just the TV on but will require someone to install, update the apps too.

androidTV has certain controls, will not allow certain apps to be installed.