Yes, the "home" resort offers an earlier booking window. For example, a BWV owner can reserve a room 11 months prior to anticipated vacation time; an OKW owner can reserve BWV only 7 months prior to vacationing at BWV. So, that means that if you wanted Christmas at BWV, those owners can reserve the time during the last week of January but an OKW owner has to wait until the end of May.
If there is a "prime" week in which you're interested, try to connect with an owner of that particular resort. As to price per point, you need to decide if taking the chance at NOT getting the size accommodation or resort itself is worth the extra dollar or so that you might save by waiting. An example of this would include folks who want to rent during December; at this time, the resorts are fairly well committed with little/no availability left.