The main difference between the Pan American Games and the Olympic Games is:
Only countries in the Americas and Caribbean participate in the Pan American Games, while the Olympic Games are worldwide.
This statement highlights the geographical scope of each event, with the Pan American Games specifically involving participants from the Americas and Caribbean, whereas the Olympic Games feature athletes from around the globe.
The other statements are either inaccurate or misleading:
- Professional athletes can compete in both the Pan American Games and the Olympic Games now, as the rules have changed over time.
- The Pan American Games are not exclusively held in Buenos Aires; they take place in various host cities across the Americas.
- Both games are typically held every four years, although the Pan American Games can have different cycles due to scheduling.