Would be very interested to hear your thoughts once done.
Returning to the original topic of this thread I have now created custom i1Match Chroma + profiles for the following papers. All profiles were created using 918 charts and under the same software settings.
Hahnemuhle PhotoRag Pearl
Hahnemuhle PhotoRag Bayrta
Epson Traditional Photo Paper (I think this is the same as Exhibition Fibre Paper)
Ilford Gold Fibre Silk
I have viewed all four used the comparison option in the Apple ColorSync Utility. They all seem very close but Pearl seems to have the largest volume followed very closely by Gold Fibre Silk. To my eye the custom Traditional Photo Paper seems to extend into the shadows just slightly more than the others and the Hahnemuehle Baryta just slightly weaker than the other three. I am sorry that I can't be more objective than this but unfortunately I don't currently have access to ColorThink.
From my own personal perspective, I have found this exercise very useful. Most of the time my clients prefer matte papers but I like to keep a roll of at least one resin style paper just in case. I now feel comfortable continuing with PhotoRag Pearl for these rare occasions and I no longer feel a pressing need to experiment further with the Baryta papers.
Edit1: There is one last thing I forgot to mention. I produced two A4 copies of a test print on Hahnemuehle PhotoRag Pearl, one using a LOGO Chroma + profile and the other using a LOGO Colorful profile. For this print the LOGO Colorful profile resulted in a print with visually deeper blacks, more overall contrast and a very pleasing result to my eyes.