Can you buy a screen just by looking at specs. Lets say hypothetically you lived on an island and couldn't test-see any screen. Your choices are three companies, all priced within a few hundred dollars of each other. Would there be any way, besides user reviews, to determine that one screen might be better than the other? Screen gain about the same, viewing angle about the same. So basically, the screens have about the same qualifications on the surface.
In other words, you are looking at 3 diff. companies, Da-lite, Vutec and Screen Innovations. All between 1.0-1.3 gain, all within a few hundred dollars. AND, you can't trial any of them. How do you make your choice? Is there an objective way to tell?