Just in regards to which ships are faster, ST or SW's, I believe the answer would be both...from a certain point of view
When you see the SW's vessels jumping from one side of the galaxy to the other with Hyperdrive engines, you have to admint that the Hyperdrive engine is faster than Warp, considering travelling from one side of the galaxy to the other. ST ships are unable to do this.
That being said, ST ships can travel at warp, and are capable of using warp propulsion even during battle. Thus in real space, ST ships would have a speed and manuverability advantage over SW's vessels, due to ability to reach faster than light speeds locally.
I hope this make sense!