I was watching this video and it struck me how much taller Art Garfunkel was than Paul Simon. I wondered how much taller he was so I looked round the net. One site said he was 9 inches taller but other sites said Paul Simon was 5 foot 3 inches and Art Garfunkel was 5 foot 9 inches. That's only 6 inches taller?

In the video, Art certainly looks more than 6 inches taller than Paul? What do you think?