What are the key differences between PI planning and sprint planning in Agile project management?

PI planning, or Program Increment planning, is a larger-scale planning event in Agile project management that involves multiple teams working together to plan for a longer time frame, typically 8-12 weeks. Sprint planning, on the other hand, is a shorter-term planning event that occurs at the beginning of each sprint, typically 1-4 weeks, where a single team plans the work they will complete in that time frame. The key difference lies in the scale and scope of planning, with PI planning involving multiple teams and a longer time frame, while sprint planning is focused on a single team and a shorter time frame.