To start with, the display resolution has jumped from 1080 x 1920 to 1140 x 2560 pixels.
If you wear glasses for reading, taking them OFF negates any difference in the screens. And saves you hundreds of Pounds, Dollars or even millions of Dong.
But Samsung still has some software bugs such as when a Euro language is selected - it still lets Chinese or Vietnamese appear onscreen when used in Asian countries.