The similarities with VPA/Alero end at the concept of QR-based login. It is a system for provisioning enterprise vendors and requires a substantial onboarding process. It is not an SDK for integration into consumer-facing / third-party applications.

Can't speak for how it works on the back end (though it clearly works differently from Keyri given VPA's QR code contains much more data and is therefore slower / more unreliable to scan). In terms of security on the front end, VPA is phishable as explained in earlier comment threads.