We wouldn't know for sure if Satoshi did. They were both nyms. But it's definitely plausible.
Discussion
Likelihood of a common identity can probably be ascertained through stylometry & other methods of behavioral analysisβ I'd be surprised if it hasn't been done already, to be frank
Plausible for sure.
hal finney wrote both the bitcoin whitepaper and the cryptonote whitepaper. they'll prove it someday when they remove him from the freezer.