I just got my first set of Wallnuts today. I've climbed using BD nuts for long time and after reading tons of stellar reviews for these I wanted to see what the difference is. Being day 1 I haven't had a chance to use them yet but when I do I'll try to update this review. But here is a desktop comparison:
My Standard rack of BD nuts comes with 13 nuts, these Wallnuts come in a set of 11. Essentially, BD's 1, 2, and 3 are all smaller than the Wallnut 1. On the other end the BD 13 is slightly smaller than the Wallnut 11.
This was some what disappointing. I was hoping the Wallnuts would come in lighter than the BD's, (better materials, less nuts should save some weight right?) Well, the full set of BD's come in at 14.6 oz while the full set of Wallnuts weigh in at 15 oz. So slightly more weight, less nuts.
However, after reading how easy they are to place with that unique geometry I'm exciting to give these nuts a try. (For some reason this discussion always cracks me up...)