That just came out here. I used it last week, and it handled just like the interior Aura. But I was putting it over flat painted rough sawn, so the adhesion was not an issue.
An actual primer made for adhesion, tinted to close to your finish, is a good insurance policy still, I think.
And if it is going to take 2 coats, which is actually what the interior Aura looks best with, might as well have one coat more effective at half the price.