I initially thought I wouldn't like the glassed in buttons, but they work just as well as the physical buttons. But I wouldn't spend any money to upgrade from the 6.5 to the 8 inch one, unless you just can't think of anywhere else to spend money.
I have experience now with 3 different recent screens - the 6.5" matte screen in the '16 R, upgraded from there to the 8" Discover Pro matte screen from Bill @ EuroZone, and now the newest 8" glossy screen w/capacitive "buttons" along the sides, with the volume/tuning knobs moved into the center of those "buttons".
For me, the sweet spot is the 8" matte screen with hard function buttons. It just does everything well, doesn't show fingerprints or dust, and the larger screen was a worthwhile upgrade from the original 6.5" screen. The newest glossy screen is just a mess. The capacitive buttons are a pain to use, the whole thing is constantly dirty-looking, and despite what some have said about the LCD panel being superior to the Discover Pro panel, I just don't see ANY difference other than it being glossy. I'm seriously considering backdating my '19 to the earlier 8" matte screen, I'm so frustrated with the current mess.
That's my take, others may feel differently. But at least it comes from direct experience with all 3.