Aight, went and stole it and played a bit with both.
The OG Switch feels flimsier, the Lite feels compact and solid, like you could drop it and it could absorb the fall.
The shoulder buttons feel like they have more padding on them, lighter to press.
The screen is smaller but it doesn't seem significantly smaller. My sister mentioned noticing a slight difference and she does play handheld on the OG far more often than I do.
It came with an AC Adapter, which was something she was worried about because the box was so small
The Yellow looks nice.
If you want me to justify you getting one, I can give it a thumbs up.