I've been researching this a bit myself (first stay at PBR coming up on 1/18, in a Club 2Q).
My understanding is that although there are deluxe-size rooms throughout the resort, the deluxe-sized ones designated as "Club" 2Qs were originally just those in the Villa wing. At some point however, PBR decided to start upselling its deluxe-sized rooms in the East and West wings as Club Level too. The downside of these farther-flung rooms (besides the long walk to the Lounge) is that they evidently don't have the bathroom renovation that the Villa deluxes received a few years ago, wherein the toilet was enclosed behind a door. I know there are other bathroom variations between various deluxe 2Qs as well (extra shower or no, 1 sink or 2) but I haven't been able to pin down which of those are located where, or whether they tend to be Club or not. While there are many room tours online, the vloggers don't tend to specify the room location: some of them even present mobility accessible rooms and their associated features as if they think every other room will be identical to that.
It's been really frustrating: we're a party of 5 with 3 teens, and little things like an extra sink or a separated toilet will make an enormous difference in the usefulness of the space: not knowing what we can expect to get adds unnecessary stress... but this is what I get for pouncing on a good APH rate and taking a gamble.