All OKW grand villas have the same point cost. Originally there was ho "near Hospitality House" booking category for any OKW rooms.
DVC added that as a separate guaranteed booking category many years ago, and there are only two GV's in that booking category. Do not purchase OKW under the belief that you will be able to easily get GV's near the Hospitality House. If you do so, you are likely to be severely disappointed. Year round, those near-Hospitality-House GV's usually fill within nanosecocds after the 11-month reservation window opens for any given date. The winners are simply those whose computers communicate faster with Disney's computers at 8 a.m. at 11-months out than others also trying to get them.
As to the DVC availability tool, I do not know which one you are looking at. The official one used by members for making reservations on the DVC member site does have a separate booking category for "Near Hospitality House" GVs, although for most times, you will find them only in the "Not Seeing What You Want" "View Other Rooms" category for rooms already booked but which can be wait-listed. I have at times seen ones created by brokers who do rentals that do not show such GVs, probably because they know it is near impossible to get one.