Ok it appears some people arent familiar with the Terminator models and their capabilities. Arnold is a T-101, T-101s are the majority of Terminator models, they make up the bulk of the army. Basically theyre just like a Phase I Dark Trooper. As far as theyre weaponry goes they carry what appears to be a rapid fire plasma gun as seen in the movies. So to compare it to SW weapons its like a heavy repeater.
T-1000s are much more advanced. The bad guy in T2 was a T-1000. Theyre made of liquid metal and can shape shift into anything of the same size including their limbs into blades.
The T-X which is the newest model which will be in T3 this summer appears to be a machine like the T-101 is, only it is coated in T-1000 metal and its arms can morph into heavy energy firing weapons.
See the T-X in action here:
http://www.apple.com/trailers/wb/t3/)
Now the Dark Troopers.
Phase I is pretty much like a T-101 so theyd be equal.
Phase II is bigger, tougher and has a jet pack. It carries a rapid fire blaster cannon.
Phase III is just like Phase II only bigger and tougher and has rockets as well as a blaster cannon.
Obviously all Terminators and Dark Troopers can take quite a beating before breaking down and each new model is faster and tougher than the last. If I forgot to mension anything please post it.