well considering the one X is newer than the pro. it would make sense that microsoft have been working on next gen for shorter than Sony. now that isn't bullet proof logic but you'd think.
anyway. we do know Sony is deep into working on the PS5. multiple devs mentioning working on next gen games in Sony 1st party studios. do you think we will see both consoles next to each other like last gen?
I don't think microsoft can afford to let Sony release significantly earlier.