You need to get screen samples in my opinion. Making decisions about screen material without seeing it yourself could lead you to something you don’t care for.
If you want to go through the trouble, here is what I did. Took a sheet of 4x8 drywall and painted (flat paint) the whole thing a neutral negative gain (N 8.5 I think, which is a gain of 0.85) There are custom neutral mixes listed in the DIY screen section for quart mixes. This will cost you about $15 total. Then I taped screen samples to it. This gives you an idea of negative gain (Behr grey flat mixes) and then for comparison, what all the screen samples look like neutral gain, mid gain high gain, hybrids...
Very eye opening. I settled on the Da-lite High Contrast Matte white for its balance of good black level without a huge sacrifice in lumens. It’s rated at 1.1 gain, but I would guess its closer to 0.95-1.
I think screens are much more of a preference thing, and you can’t just pick one by the specs, or what someone tells you.