Just the art. All the rules and the gameplay are the same. One comment we heard over and over during development was that the cards in Tessen Classic are hard to distinguish. This has been addressed in Tessen with the new art and graphic design and has resulted in a smoother game experience.
The backers at the early bird level will have their games shipped first. Since we’ll be doing our own fulfillment this could get the game to you several days sooner depending on the volume of shipments.
International shipping is challenging, for individual game shipments especially. We encourage international backers to seek others in their area to go in for the larger packs. For 10 copies, the per unit cost is the same great $12 price that U.S. backers are getting.
Funny story... Wayne, the Tessen artist did some math and so kindly advised me that if everyone took the $12 pledge $8,000/12 = 666 repeating. I know what you are thinking... Artists can divide?!?!?
All kidding aside, basically the answer really is "to avoid any bad omens".