Light tank, fast, decent armor, not to much, anti infantry.
Medium tank, very fast, very little armor, large firepower, for fast flanking things and taking out artillery.
Medium tank, normal speed, normal firepower, anti light vehicles, in large groups also anti heavy vehicles.
Heavy tank, heavy armor, as fast as the medium tank, heavy anti infantry, lets say one of these compairs to 3 or 4 of the light tank. And a few rockets for anti vehicle.
Heavy tank, heavy armor, slow, large firepower, anti heavy vehicle, weak against infantry.
Republic: (remember the republic had very little heavy tanks after the mando assault)
Light tank, fast, decent armor, anti infantry. Like a few machine guns.
Light tank, medium speed, little armor, anti light vehicle,
Medium tank, heavy armor, little firepower, slow or fast as you please, sort of garbage tank, a cannon foder but if it really needs to fight give it some all-purpose rockets or lasers.
Medium tank, normal to heavy armor, medium firepower anti medium vehicles, weak against infantry.
Medium-heavy tank, NOT AS HEAVY AS THE SITH, normal to heavy armor, normal to heavy firepower, different weapon systems like light and heavy rockets, light and heavy lasers ect. Anti medium vehicle but also infantry, sort of the previous medium tank only upgraded.
Super-heavy tank. Heavy lasers, heavy rockets, heavy machineguns. I mean not really machineguns but like heavy repeating laser cannons. Anti all.
This is it. The Tripod will serve as the heaviest tank for the sith.