It's weird how they do it, RPR is often the cheapest. Right now for my August dates PBR is the cheapest of the express pass resorts because the only thing available at RPR is the captain's presidential suite for $1428/nt.
For the dates you listed, they don't (yet?) have a ST rate at RPR, so the std 2 Q is $394 rack rate. HR garden view 2 Q has the ST rate at $318. PBR ST rate is on Bay View King room for $353. When I look at the OI discounted room site, their rates for RPR and PBR are sold out, but they still have some at HR for that weekend. Rates change frequently and a lot can happen between now & November. I would grab the lower rate at whichever you prefer and keep watching, you can cancel for free and rebook somewhere else.