This card will work within the PSP just fine, won't it? :

8 GB Sandisk from Walmart, $30
http://www.walmart.com/catalog/product.do?prod

If so, then why do they have the same memory capacity here for $40 more?! :
http://www.walmart.com/catalog/produ...ct_id=10652319

The second product says "For PSP/PSP Slim". Can anyone clear up some of my confusion? Thanks :) .