eth4510765 wrote an answer about Black Diamond Factor 130 Alpine Touring Boot - Men's on December 24, 2011
I am going to have to disagree with the previous answer on which boot is wider. The Quadrant definitely has a much higher volume forefoot. Not only are both boots designed for different purposes but are designed around different lasts as well.
If your foot fits well in the quadrant it will likely not fit well in the factor. I have the opposite problem with a low volume forefoot and the factors fit well but the quadrants have way too much room.
Hope this helps. Try them both on and decide for yourself as only you will be able to decide if it fits or not.