Let me rephrase then, or repost what I said:
"Superspeed" or not, 190 or 300 MByte/s seems still behind the typical SSD speeds.
SuperSpeed is for speeds up to 650MB/s. SSDs apparently can get close to to that max speed. they sure seem to go over my 370 requirement. http://www.overclockers.com/inateck-ua1001-usb-3-0-to-sata-adapter-review/
USB sticks don't. I don't know what the case was in 2013. We can call both of them SuperSpeed and to be correct they are and I was wrong to word it that way, but that's not important here, what is important is I need 370 Mbyte read speed, like I've said already, and USB sticks can't get there yet it seems.
I meant SSD, not hard drive, it was a typo.
In summary, some people claim SSDs can do the speeds I need, without an adapter though. Testing my own notebook's SSD I get about 500 MB/s sequential read speed. I've also found out that this likely doesn't change over the lifespan of the SSD ,unlike HDD.
As much as I would love to go with USB sticks which are mor familiar to users, even though they are technically SuperSpeed, I can't find one which could do the 370 MB/s minimum read speed.
I guess the only question left now is, unless someone has a different info on the above, what about when connecting the SSD via a USB adapter?