Bigger screenGet none of it except for OLED. SOC is barely any better and screen res is still the same.
OLED
Weighs slightly less
Better APU
Better speakers
Bigger battery
Better Wifi
Better thermals (and thermal noise)
Joysticks improved
Easier to upgrade some parts
Slightly better performance (RAM is a bit faster going by reviews)
So just about all internals improved apart from hardware performance and device size.