A Pathfinder starting setup should identify the rules edition, the intended character options, and the adventure or scenario the group will play. Use official current references for compatibility and errata questions.
What to compare
Edition and revisions
Check the exact book or box release and the relevant official guidance. Similar subject matter does not make all older and newer rules interchangeable.
Learning route
Compare a guided beginner product with starting from core references. Consider how much preparation the game master and players want before the first session.
Character materials
Confirm whether prepared characters, advancement guidance, maps, and play aids are included. Separate required rules from optional setting detail.
A detail worth checking
A discounted older book can be useful, but only if its role in your chosen rules setup is clear. Avoid mixing versions by accident during character creation.
Make your next session easier
Choose the rules baseline together, keep a shared list of allowed references, and prepare a short opening encounter before planning a large campaign.

