I have the same with Vibram 700 soles. I can compare them not to a 100, but a Sierra. I have a NW lasted six inch White's boot with the Sierra sole. The 700 is a bit lighter and broke in almost immediately compared to the Sierra.I’m considering switching out my soles for something lighter. I have the bounty hunters in Horsehide with a vibram100 lug sole. Would a different sole make a significant difference? Or is it not worth the change? Thanks