Is Switch 2's 256gb on par or worse than PS5's 825 launch model?

[LegitHyperbole]

I'm throughly confused, where does the "extra" data come from with GiB if a bit is always a bit... does it start at the byte? How is the byte different that you end up with 24 extra gigs? I might be too tired for this one. Are they the exact same size but GiB has inflated numbers that aren't real? Can someone explain this to me like I'm addicted to Clair Obscur and I'm loosing chunks of sleep to play that game.  🙃  please.

Is the polling options accurate to the storage on a launch PS5 at 667.7 GB?