LG G6 & Samsung S7: which to use as back-up? which to play around with?

[RebDovid]

My wife, one of our daughters (who lives a few miles from us) and I all now use a Pixel 3 as our daily phones. I have in a drawer both a Samsung Galaxy S7 and an LG G6.

I want to give one of the phones to my daughter to stream music to a Bluetooth speaker for her four-year-old, enabling her to use her Pixel 4 herself. Meanwhile, working from home on a reduced, three-days-a-week schedule, I have time to play around with the other phone, something I haven't done since I got the S7.

Having been away from things for some time, I'm wondering is one of the phones easier to root and update to a modern, stable ROM? If so, is there any reason not to keep that phone?

TIA

 

[RebDovid]

I decided to focus on my LG G6 as likely to offer more scope for rooting, ROMs, etc., than my S7. Also, except for the camera, I had enjoyed the G6 more than the S7.

Despite some hiccoughs, doubtless attributable to my being several-years out of practice, I rootedmy 20g phone successfully following runningnak3d's methodology.

Now it's on to reading up regarding ROMs, learning Magisk, and relearning Titanium Backup. Advice regarding any of these topics, or anything else relevant to the G6, is welcome.