Yes the initial release of the STI was supposed to be a 20-30hp bump na. Then the release was changed to have a turbo. I am assuming since they are releasing a turbo this trumps the na version. Subaru confirmed turbo. Not random facts. I guess you can just wait a couple years to see it hit dealer floors to have your confirmation since we can't fast forward time.
But by your logic I do not understand where you get the BRZ STI will be 250hp na (220-230 stated by Subaru). Would love to know where these random facts come from. I mean I can't put my hands on one so it is just random facts and Subaru hasn't confirmed that either right?