> One difference is that this neighbor will always be there for you.
Someone you're copying from during an exam is there for the whole duration of the exam. Neither are there "for you" though, they're just there.
> But you can discuss anything as much as you like with AI.
No, because a statistical model isn't thought. You can get something out of it, just like you can get something out of watching a movie that was made without the knowledge of your existence, but that something is not conversation.
Or rather, since the AI also stole from others, peeking at the neighbor's output, who in turn stole it from his neighbor.