Are they diferent?

What are the differences between SanDisk Extreme 16 GB SDHC Class 10 UHS-1 Flash Memory Card 45MB/s SDSDX-016G-AFFP and SanDisk Extreme 16 GB SDHC Class 10 UHS-1 Flash Memory Card 45MB/s SDSDX-016G-X46 besides their price?

Regards,

Rotor