Anyone who reads everything Satoshi wrote and pays attention to how Craig behaves knows 100% that they are not the same people.

But let's say for sake of argument that we're all wrong about it and Craig actually is Satoshi. It would be entirely irrelevant to Bitcoin. Bitcoin is open source and Satoshi handed over total control of the repo a decade ago. It's not his project anymore. He can claim all sorts of legal rights over the project but we'll all just fork away if that happens and keep doing what we're doing.