What is the key difference between scenario planning and what$-$if analysis?

Scenario planning focuses on what could happen, while what$-$if analysis focuses on what's likely to happen

Scenario planning focuses on what's likely to happen, while what$-$if analysis focuses on what could happen

Scenario planning only considers best$-$case, worst$-$case, and expected scenarios, while what$-$if analysis considers an unlimited number of scenarios

Scenario planning is a qualitative approach, while what$-$if analysis is a quantitative approach