For me there is no overlap. I keep my Maxxed Out around 2000 for oil, while the Aura has been cleaner through the heads and recovers stronger down lane.
The Aura has amazed me. I bowl a 2nd shift league on Tuesdays. The past two weeks I've stayed with it for all 3 games, which is rare for a solid. I just keep moving left, left, left, and opening up the lane more and more, and it keeps getting back to the pocket with guts to carry. The other night was 772 with a 290 in the LAST game. Usually I've gone to much weaker covers by that time...