No difference between the two.
>when the background check and security comes clean (which it will in my case), is there a good chance of getting PPR?
Yes, that's how it is done.
Although, sometimes with tracker's eligibility marked pass, GCMS notes say "review required" and eligibility is set as recommended pass - none of it is relevant to this conversation as you are highly unlikely to fall into that category. When it is recommended pass, someone else is required to take a look at it before issuing you a PPR. Mind well, I'm getting into an edge case here. That's the worse that can happen.
True eligibility(for an outland applicant) is passed when your passports are stamped. Before that, you pass the minimum entry criteria for your PR application.
