My preference is a durable paper that keeps its paper white in time and allows a good load of ink for a good gamut and still resolves detail. A better mechanical scratch resistance of the print surface is nice too. On longevity cotton and alpha cellulose do not make a big difference while cotton usually is more expensive. The label cotton on a paper is probably more reliable than the label alpha cellulose, I get the impression some papers have an alpha cellulose label for a paper base that is at best Acid & Lignin Free, ECF Bleached Chemically. It would be better if it was at least buffered to counter any acidity later on. Some cotton qualities have an inferior inkjet coating.
The paper quality you did not include, resin coated papers, have some qualities you can not find in the other papers and longevity could be equal or better on some paper properties and sometimes on all. Mechanical testing of papers, their tensile strength, the folding proofs, the bond of the paper components to one another has not been done by independent institutes as far as I know.
You will find more warm papers in the cotton category and fewer cool papers, that difference is more pronounced in the baryta/fibre class than in the matte art papers category. Cooler papers that stay cool in time are more likely found in RC papers than in the other categories.
I am an omnivore in paper use but I like to check their properties like fade resistance before I purchase them. At least for the prints that should last. Aardenburg Imaging is a good source for information then.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012, 500+ inkjet media white spectral plots.