Star Wars wins by default. We have hyperspace, which is many multiple times faster than Warp Drive. Our laser weapons would crush Star Trek shields simply by overpowering them. A Star Destroyer is designed to go into battle, and last for what quite possibly could be many days, doing head-to-head. How many times have we seen a Star Trek episode where the Enterprise is almost shield less within minutes of entering battle? There is also no guarantee's that Star Trek's shields, transporters, etc, would be able to circumvent Star Wars shields, or even that Star Trek's shielding systems would block Star Wars' turbolasers. Entirly different premises of technology.
There is also a size factor. The Empire had, at its peak, tens of thousands of Star Destroyers of various classes. These range from 900 meters to 1200 meters long, on average. I believe the Enterprise may be 400 meters long, and it is stated as being the 'flagship of the federation' on more than one occasion. How long could the Federation withstand the might of just the Empire, if their
flagship is the size of one of our
gunboats?
I personally get quite disgusted when people bring, in arguments like these, factors such as the Force, Q, the Borg, the Vong, etc. These are obscurities of each galaxy, and are highly unlikley to even come into play.
The Borg are also likely to succumb to the Empire very quickly. They use unshielded craft, that rely upon adoption for defense. How fast are you going to adapt when you are suddenly being pummeled with hundreds of turbolaser rounds per minute? A ISD MK II vs a Borg Cube would result in Borg Slag in just a short while. The Star Destroyer is designed to level all of its main weaponry at a single target, and fire it continuously. It is also designed to slag an entire world in hours. The amount of power fired from such a craft is mind boggling, as anyone who has perused the TF.net tech commentaries will attest to.
I find there to be no contest, what so ever. With Hyperspace, un-blockable hit-and-run attacks will be mounted. It is my opinion that a single STar Destroyer & compliment could, under the command of a competent commander, completely decapitate and decimate much of the Star Trek universe.
There is also no contest when it comes to sheer power. Without bringing up the Death Star, the Empire has a simply mind-boggling amount of firepower at its fingertips.
Sheer size also comes into play, as mentioned by someone before. 80% of an explored galaxy, vs 5%.
I might also note that when it comes to ground combat, Star Wars would win. Has anyone ever seen some real, effective ground combat in Star Trek? Do they have any weapons beyond hand phasers, pulse phasers, and the occasional rocket launcher?
Also, chedk out this site, it's quite interesting and goes into more detail about the points I brought up.
http://stardestroyer.net/Empire/Check this for details on weapons superiority in Star Wars:
http://stardestroyer.net/TPMRevelations/#Weapons