Whats the different between
*Intel® X25-M 50nm (black case)
*Intel® X25-M 34nm (silver case)
When i order my SSD almost a year ago there was a picture of the one with black case, also with the serialnumber SSDSA2MH160G2R5
But i recieved the one with silver case and serialnumber SSDSA2M160G2GC
Why, and was it a bad change?