The Lynx was the first colour backlit handheld, launched in 1989 with hardware scaling and rotation the Game Boy could not touch. It could also be held either way up for left-handed players. Battery life and price sank it.
Full-speed on all R36 models. Rotated games need a display-rotation option in the emulator.
The chip is the same in every model, so the rating is too. What differs is the screen: 4:3 panels suit most home consoles, the 1:1 square panel suits Game Boy and GBA and shows 4:3 games with bars.
The R36 handheld family runs Atari Lynx titles with perfect compatibility out of the box.