My report: It seems like CRP is pretty close to HPR. The linearity check for CRP is very close to that for HPR on my printer.
However the profile you posted is better for my (Special Edition) R1900 printer, i.e. very close to linear, so I can only assume that whoever had this made must have a printer that has drifted in the same manner as mine. A sample of one is too small to draw conclusions, but I wonder if there is a roughly predictable pattern in the way that printers drift.
I retain concerns about IJM not providing profiles for each of the paper / printer combinations that you sell, but it's not affecting me in this instance. Thank you for sharing this profile.