With a lot of these, you could kill your enemy with his own army. This is a special atreides unit. It fires sonic blasts. It's especially good against infantry. The problem is that the sonic blast affects anything in its path, including friendly units.
Sonic tanks are really stupid.
I've seen once a s-tank fireing at an enemy soldier through a whole squad of fremen, killing them all. The sonic tank's range is smaller than the launcher's and the deviator's. The devastator is a special harkonnen unit. It fires devastating plasma. It has a huge armor.