Ok #css nerds, I'm working on creating a theme for bootstrap 5.2, I'm making changes to buttons, specifically the padding, and building bootstrap from sass.

I can override --bs-btn-padding-y in the relevant class, or I can override $btn-padding-y (or $input-btn-padding-y) in the sass. What's the difference here? I think the former is easier to read and find, but that's the only distinguishing feature I can find on the face of it.