The OAR is whatever the filmmaker wished his film to be presented in. In this case it is the 2.35:1 version. It doesn't matter if the fullscreen version has more information. Coppola cut down Apocalypse Now from 2.35:1 to 1.85:1 for framing purposes.
And it was my understanding that T3 was shot in Super 35, not hard matted from 1.33:1. Anyone know for sure?