If by "general purpose computer", you mean "runs any OS I could throw at it", then broadly speaking any Mac is more general-purpose than any non-Mac, since they can run macOS plus whatever other OSes will run on the architecture they're built for.

If, however, you actually mean "a computer that runs Windows or Linux"...why not just say so? Rather than passive-aggressively pretending that all you're looking for is "general purpose", with the obvious snide implication that macOS can't provide that...