Jackie...
The D302 set is the set with the 13 different poses. The set only features Jackie Robinson. They are marked by their white borders, and they do have square corners. They are also very difficult to find (only 2 people have full sets on the registry - Spence, and another individual). For that reason, they are the priciest of Jackie Robinson cards. I personally am putting together this set. Below is an example.
The D305 Bond Bread set features Jackie Robinson, and 47 others. This set has rounded or die cut corners. Ted will probably be able to talk about this set in more detail than I, but I do know that many of the square cut cards were printed later. You can usually tell by their backs. PSA will not grade any cards from this set, though SGC will grade the cards with die cut corners.