Sir, yes, stylistic differences absolutely does mean they were written by two different people.
Did you think I assumed you would just take my word for it? Not in the slightest. My intent was not to prove it to you, but to present to you another way of seeing things, a way that scholars look at it. In my dreams, you would find the idea unnerving enough that you would look into it. But my expectations are that it will likely not move you in the slightest. That's kind of how these forums work
If you want to make my dreams come true, here is a good place to start: