Michael Goes said
11 months ago: In my experience selling higher ticket items, informative, glossy paper brochures are a must. While customers do come in and say the website brought them in, they almost always ask for a brochure before leaving.
To answer your three-part question; my opinion is that customers prefer a nice paper brochure over digital. In regard to efficiency, well, digital is obviously more efficient. As far as serving the purpose; they both do, however, I believe a nice hold-in-your-hand quality brochure has more of an impact in generating desire.