Diane, here are paper white readings for most of these papers I did a month ago or so-
Hahnemuhle FineArt Baryta- 99.9, 1.2, -3.7
Hahnemuhle PhotoRag Pearl- 98.5, 0.1, 1.6
Harman Glossy FB AI- 99.9, 0.2., -3.0
Innova FibaPrint Ultra Smooth Gloss- 97.7, 1.2, -5.4
Innova FibaPrint F-Type White Semi-Matte- 97.7, 0.8, -3.6
Ilford Gold Fiber Silk- 99.8, 0.1, -0.6
These are LAB numbers. No paper is "virtually" white, so the 1st number will always be less than 100. The second two would be 0 if the paper were dead neutral. A negative last number indicates blue, so you can see that GFS is quite neutral compared to the others. Also, the Innova semi matte is a bit less blue than the gloss.
Whether or not that is subjectively desirable is up to the individual.
Hope that helps. John's visual comparison was going up just as I was writing this, your eyes are always better than numbers regarding these kinds of decisions.