Choose by the knowledge gap
Compare HNK formats by what the student still cannot explain. A dramatic title is not a reason. Foundation practice is for a student who cannot yet teach a claim back. A workshop is for a school that can name a year group and an artifact. A studio loop is for a student who already has a map and needs repeated revision. None of these is a certificate track.
HNK is not QFP (prototype under a constraint), not QKV (a test another person can rerun), and not PQK (field friction narrowed to a question). Those are related projects of the same institution, disclosed on the about page. Use this compare page only for HNK formats.
Still unsure: info@hnk.org with the unexplained sentence and the time you actually have.