SanDisk Compactflash cards


I have been researching 4GB Compactflash cards and I have noticed that there seems to be two Ultra models, one from Wal-Mart and one other model from all the rest of the vendors.  They seem to be identical but the Wal-Mart card has a SanDisk Model # of SDCFH-004G-AW11A,  other retailers <Amazon, Newegg, etc) carry the Sandisk Model # of SDCFH-004G-A11.

Can anyone out there tell me the difference between the -AW11A and - the -A11 model?



it is just packaging code. walmart requests special packaging therefore it has a different packaging extension. 

Thanks for the info!!!