Datacolor has released an updated Spyder Checkr Photo in North America that features a new style of protective case. Even though the cases are shaped differently, the cards inside are identical in both function and size

Therefore, the usage, handling and results are exactly the same.
The Spyder Checkr Photo color- and black&white cards as well as the replacement cards (will be released soon) are identical and have the same size. Therefore, you can use them in the rectangular-shaped and shaped Spyder Checkr Photo case (SCK300 and SCK310).