usb3

This script
date +%s ; dd if=debian-stretch-DI-rc3-amd64-netinst.iso of=/dev/sdd ; date +%s;
gave me the following:
usb 2
1494934350
593920+0 records in
593920+0 records out
304087040 bytes (304 MB, 290 MiB) copied, 61.3289 s, 5.0 MB/s
1494934412
usb 3
1494936920
593920+0 records in
593920+0 records out
304087040 bytes (304 MB, 290 MiB) copied, 0.907079 s, 335 MB/s
1494936921
So what I did was download a file and write it to a usb using usb2 and usb3.
The file was a Linux install iso:
304087040 May 16 04:12 debian-stretch-DI-rc3-amd64-netinst.iso
About 304.1 MB (Million Bytes) A small file.
USB 2 took 62 seconds
USB 3 took 1 second
Conclusion USB 3 is faster than USB 2