I think once this is done itll make for a great link for just about anyone who posts in the newbies section looking for help in picking a first timeshare for sure!
and likely lead to tons of other questions!
I think it is important to keep in mind the target audience for this excellent chart that compares the most basic properties of each systems' program.
Does someone new to timeshares care about the deeded versus RTU ownership types? imo, not in the beginning when they are just trying to narrow down the choice to a few. Does the OP who started all this necessarily care about how ownership is defined within any system? Probably not, and they probably would not know what "RTU" means. (How many posts have we read about confusing abbreviations).
I do not think deeded ownership offers anything "tangible" versus Right To Use. It is a timeshare; it is not like you can use it as collateral for a "timeshare equity loan" on a deeded timeshare. As an experience timeshare owner, I find non-deeded timeshares to be preferable -- much easier to transfer ownership.
Long story short, I think the type of ownership is not a primary concern for new owners, and the subtleties would just confuse potential new timeshare owners. These subtleties can be explained in detail within the links to the FAQ for each timeshare system, if the owners in any particular system find it of major importance. (In the WorldMark system, for example, it could be explained in one, short sentence).
Considering all this, I suggest deleting the "Deeded or RTU?" row from the comparison chart.