it was a rule change between printings. the new version reduces setup time and means you don't miss any of the original cards.
also means you'll likely see less echoes cards in any given game.
Thanks, that makes sense. Most of the early reviews complained about setup/takedown time. For us, its not really that much extra work. But the game goes a lot slower, and we usually end before we get to Age 6 in a 2 player game.