I know the difference......but poor, poor Bill......
President's Cup.....US versus World Team (no Europeans)
Ryder Cup.....US versus European Team
US currently holds the Prez Cup......Euro Team holds the Ryder Cup for just a bit longer!!!
Bill......the President's Cup was designed as an alternate year event after the Ryder Cup. It purposely was designed to allow players from around the world to participate who would not be qualified due to citizenship in a country not within the continent of Europe. That would include S. Africa, S. America, Asia, Canada, etc.
All European team players in the Ryder Cup must be citizens of the European continent......