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| Criterion |  Growth Pirate Metrics AARRR |  Growth North Star Metric |  Product Discovery Learning Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | For products with complex usage paths, overall growth alone is too coarse to reveal bottlenecks. Pirate Metrics breaks the relationship with the product into consecutive stages and shows where the funnel actually leaks. | When product teams track many metrics, the view of the actual customer outcome easily gets lost. A North Star Metric bundles growth, usage, and value contribution into one signal that makes the system's direction visible. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | 1-2 h Setup, laufend | 1-2 h | 25-40 min | 1-5 Tage |
Participantsdifferent | 2-8 | 3-8 | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | AARRR funnel, Metric baseline, Experiment backlog | North Star metric, Input metric tree, Measurement cadence | Learning Card with evidence and next action | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | GrowthMetricsExperiments | GrowthMetricsAlignmentRetention | ExperimentsValidationDiscoveryLearning | ValidationExperimentsDemandDiscovery |