Got RN10 (4G RAM version) abt a week ago, and set up for my 70+ yo father. Overall ok.
Wait for Lazada random flash sales @ RM649.
- camera quite good in daytime.
- use lite mode or set font size to XXL. He can read even without wearing glasses.
- he is extremely light user, usually will consume 25% battery in 24 hours.
- screen is very very vivid and bright.
- dual sim + 1 microSD slot.
- slightly slimmer / lighter, easier to hold
- sound is quite loud, can hear ringtones from quite far. 
- I find some functions make it convenient for elderly
-- face unlock, pin, finger print, raise to wake up: I set all for him, easy to unlock.
-- double click volume (down) to launch camera, click the same button again to launch a 2 second timer to shoot (minimize camera shake, because no need to touch the screen)
-- Put apps he uses on the first/ second page (he has 10 buttons/ apps to click only), and move everything else in a folder, no clutter for him. Then, 'lock' the homescreen to prevent accidental click.
-- Put some widgets on the first row on the home screen (Data, Wifi, Torch, Screen lock) for quick access. He doesn't even need to swipe down for the shortcuts.