Evo is very helpfull:
http://www.evo.com/ski-weight-chart-for-alpine-backcountry-skis.aspx
Here you can check weights. Find a ski about the same size and design and compare the weight.
I always thought that my Bibbys were heavier than similar skis (same size and design) because they were stiffer than most skis, but they were actually lighter, even lighter than softer skis.