I have every card from print run 'A' and every card but one from the first print run (blank). I am missing 2-08 Joe DiMaggio. Here are the back variations I've seen. I have yet to check for variations on the front of the cards.
2-02 Jack Nicklaus - 'A' has different text
2-03 Kareem Abdul-Jabbar - 'A' has variations in text and awards
2-04 George Blanda - 'A' has updated awards
2-08 Joe DiMaggio - ??? I only have the "A' version.
2-11 Vasaloppet - 'A' has additional text
2-17 Johnny Cecotto - 'A' has updated awards
2-19 Eddy Merckx - 'A' has additional text
2-21 Kornelia Ender - 'A' has variations in text and awards
2-22 John Naber - 'A' has additional text
2-23 Teofilo Stevenson - 'A' has variations in text and awards
2-24 Chris Evert - 'A' has updated records
Please let me know if you have seen other variations.
The cards pictured above are from the Finnish version of the set. I don't have a checklist so I will wait until I finish (sorry for using that word) the North American set to search for a checklist from Finland.