I havent' had any experience on the mixed lacing system. My wife has boots with just the speed zone lacing and she loves them. The imperial will have a lot more support than the raptor. The raptor will be light from the dynolite outsole. They both have the same liner, so the comfort level should be about the same there.
The ambush and emerald are a 5 on stiffness, so they are right in the middle. Maybe try the axel for the lady and for you, try the moto, which is a 3, the rampant is a 4, and the hail or restricted hail, which are both 4. The rampant and restricted hail have dynolite outsole making them lighter.