Same strength as the Tau Smart Missiles, 6" more range, has AP -1, but is d6 hits and not the 4 that the Tau have while doing a straight 2 damage, Smart Missiles are d3. Hmmmm Tau can also take a Support system that lets get the AP -1.
Smart Missiles are 20 points Ironstorm is 16. . . hmmmmm who has the better I wonder.