TRSundown
Loke Groundrunner Rocks!
I dont think the Star Destroyer would be able to target the ST ships due to their manuverability. I am sure some would get destroyed... but eventually the Death Star would fall to a massive barrage of quantum torpedos or phaser cannons...
You also cant mix up timelines. By the time the death star came to be there were only four known force users... Emperor, Vader, Yoda, and good ol Ben.
Plus look at the DS9 series... the fleets they used against the Dominon were huge. One fleet was hundreds of ships, ONE fleet. Throw in the Klingons, Romulans, Dominon, Borg, Kazons, and all the rest and now you have thousands.
Okay, you want to talk planet/system killers - GENESIS Torpedo. ST has planet killers too.
People also keep bringing up the Jedi/Sith. Thats a big part of the SW univers and depending on the era there could be thousands or just a few... The ST universe has its mentally skilled people as well. How many times did Kirk get stuck on a planet because a force of pure energy willed him there... How many times did Q screw things up for Picard. There are plenty examples of forces in the ST universe that would give a great challenge to the Jedi/Sith.
The sheer size of the SW ships really does not make much of a difference either. In "First Contact" it took just a few ships to take out the Borg Cube... a gang bang like that could easily handle a Star Destroyer or bigger.
But again your comparing apples and oranges. Do we even know if a turbo laser or Ion canon can hurt a ST ships shields? Do we know if a phaser can penetrate the armor plating of a Star Destroyer?
Someone should start a think tank and develop an RPG SW vs ST and actually do a technology comparison and write out all the stats... It would be interesting to see.