if USB 3.0 is tested with all the diagnostic and remap tools i.e Kess/KTAG and PCMflash? because the notebook I would get has only 3x USB 3.0 (the blue connector). Till now I had only the classic USB 2.0.
Yes they will work.
No matter ori & clone Kess /KTAG and PCMflash. it will work for you. I tested Kess/KTAG by myself, and works without any problems. You have nothing to fear.
And PCM with Scanmatik2 work well with USB3.0.