They are both kind of slow, they only have one speed, walk. The civilian one has to turn to shoot moving objects which makes it not as accurate against quick targets. The heavier military ones are a little faster, don't have ski-mode but the cockpit rotates separately from the legs so you can shoot more accurately at moving targets and you can strafe while firing. It also has heavier armor, obviously, and has the straps on the legs so you can store some stuff, the civilian one has more storage space, though, because it has a larger cockpit (I suppose on a mech that style I should call it a platform or something instead) that is also open.

Also, as cool as a mobile garage would be it would be too big. I want to have the command center so that we can have something to carry around spare parts and stuff in but I don't want it to be so big that we can all ride inside and not have to face the danger outside. I was hoping for something similar to this:
[img=http://www.armyrecognition.com/images/stories/north_america/united_states/light_armoured/bradley_bcp/Bradley_BCP_Command_Post_tracked_armoured_vehicle_United_States_American_defence_Industry_Military_technology_640_001.jpg]