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The tool I used for it is called the Retrode2, a cartridge dumper which doubles as a 2 SNES and 2 Genesis controller hub.
With a bit of patience you can even run SNES carts on a Steam Deck https://mastodon.social/@16bitvirtual/116479936082268893
Is it cheap? Nope
Is it sensible? Absolutely not,
Was it fun? 100%
Oh!
I did not know that.
They're functionally the same, the oled though has a better screen and a bit better cooling so probably performs ever so slightly better in certain scenarios. And I think slightly better battery life.
Yeah, I did know that the OLED variant does have a slightly larger capacity battery and a tweaked bit of the ... basically the power management component/system in the mobo... and yeah, it has slightly different internal dimensions and layout in some respects, I've had to pick between OLED and LED variants for a few aftermarket upgrade kits I've gotten.
I just did not realize the LCD was also touchscreen, derp.
But yes, broadly speaking, very very similar in all other respects.