DOES ANYONE KNOW THE DIFFERENCE ON THE USB 3.0 64GB MODELS SDCZ80-064G-$$$$ A75 OR X45 OR X11????

WHATS THE DIFFERANCE OF THIS MODEL NUMBER? SDCZ80-064G-???   (A75) OR (X45) OR SOME OF THE OTHERS THAT ARE OUT THERE?

THEY ARE ALL THE 3.0 EXTREME USB 3.0 64GB DRIVE BUT THERES DIFFERENT MODELS??

The last 3 digits are the packaging code. This only dictates what packaging is used i.e. different regions and languages.