The Ewa Building for Aulani has Ocean view studios on one side and Standard view studios on the other side. OV 654, 656, 657, 754, 756 and Standard views 655, 657, 755, 757 are across from each other (654/655 etc). But that is it. Aulani isn't that big though if you are lucky enough to get an OV on a really high floor on 14 - 16 but standards only go up to 7. You are just a short elevator ride apart. I don't think I would want to restrict my ocean view room to be only on the 6th or 7th floor. I would just ask to be in the same building, Ewa.
See wdrl's thread, Aulani Villas and Views for a map showing room locations.
http://www.disboards.com/showthread.php?t=2907389