If this is true Im having a hard time thinking that Scorpio isnt more then a panic reaction to PS4 Pro and thats rje reason ut got announced so early.
Microsoft talked about Scorpio before Sony talked about PS4 Pro, so the logic there is flawed.
I don't think either machine is a response to the other, neither of these things could have been produced with short notice, there however is a level of techonological synchronity that has occured.