Tanks with hardend Armor pay very litte for it and the -2 to all criticals motor or otherwise make it very attractive. For mechs less so . Max armor on a mech with hardened armor is about 40 percent does not leave much left for anything else
Hardened armour also affects a Mechwarriors piloting and running no similar negatives to a tank. If I use it I’m more tempted to upgrade my tanks than my mechs.
They called me crazy…they called me insane…THEY CALLED ME LOONEY!! and boy, were they right.
There is a +1 Driving Skill for CVs, I believe.