I’d love to know how this differs from Switchy.io too.

There are not a ton of differences.
Here you get higher limits (and unlimited clicks vs 30k/code on Switchy).
Switchy has been around for longer and has more features (as far as I can tell), however most of those features are situational and it's unfair to compare.
Pxlto has all the basics and some nice extras.
Depends all on your use case.
I'd say Pxlto can outshine Switchy soon enough (the extra features of Switchy aren't that unique).

I'm a Switchy user for a long time and I'm super happy with the tool, no issues so far.
If I didn't had Switchy already, I'd go for Pxlto.