One is a device sold with a specific purpose that the buyers knowingly paid for, the other is a piece of isolated pieces pluggable hardware.
https://www.youtube.com/watch?v=3S5BLs51yDQ
“with iPad Pro + iOS 11, a post-PC world may be closer than you think.”
https://9to5mac.com/2017/11/16/ipad-pro-whats-a-computer-ad/
One is a device sold with a specific purpose that the buyers knowingly paid for, the other is a piece of isolated pieces pluggable hardware.