They teach entirely different things. My first 3 years working taught me a lot about the real world practicalities of writing useful software, as a team, that y

They teach entirely different things. My first 3 years working taught me a lot about the real world practicalities of writing useful software, as a team, that you can charge money for. It taught me very little about doing research or the cutting edge of my field. I suspect a PhD would be the exact opposite.