Ok, so according to sources here:
http://www.merzo.net/index.html
and here:
http://www.theforce.net/swtc/isd.html#dimensions
An imperial star destroyer is over twice the size of a galaxy class Federation starship.
according to the wookipedia the Imperial II-class star destroyer has the following armaments:
Octuple barbette turbolaser or Ion cannons (8)
Heavy turbolaser batteries (50)
Turbolaser batteries (50)
Additional turbolaser batteries (26+)
Heavy ion cannons (20)
Phylon Q7 tractor beam projectors (10)
KDY ISD-72x deflector shield generator domes (2)
and the Enterprise D is as follows from the Star Trek Wiki:
"The armaments of the Enterprise-D included twelve phaser arrays, two torpedo launchers, a supply of 250 photon torpedoes and hundreds of antimatter mines. The ship was protected by a high-capacity shield grid that could operate on multiple frequencies."
Unfortunately that's all the digging I can do in terms of comparison. Assuming (as high-powered light based weaponry) they have the same concentration of firepower, the enterprise is horrifically outclassed by a mass-produced star destroyer (Remember the fleet of SDs in Return of the Jedi, yep mass produced.) Additionally, keep in mind a Star destroyer is more than just a massive battleship, it's also a carrier with at least 72 tie fighters (source wookipedia).
Something tells me Matt is actually right about this one...
sorry for being "that guy"
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