Question: what is the difference between usb 3.1 gen 1 and gen 2?
Answer: The difference between USB 3.1 Gen 1 and USB Gen 2 is as simple as this: Gen 1 offers 5Gbps speeds, whereas Gen 2 offers 10Gbps. Seriously, that's it. The USB-IF never intended for the those terms to be used in marketing materials, though.