It depends on how much knowledge the Federation commander has going in. The Empire's contact policy is belligerent, and the ISD commander is likely to fire before the Enterprise commander exhausts the diplomatic playbook. Then it's a question of whether the Enterprise's shields can dissipate enough energy in the first exhange--I know Worf and Picard were openly contemptuous of laser fire in TNG, but that was from a vessel smaller than theirs, and the ISD's main batteries are turbolasers, (whatever that means.)

Also, if the ISD commander opens with a tractor beam, then we get to discuss how much power each ship can generate! Star Trek technology is flat-out better than Star Wars tech, but an ISD is two and a half times bigger than the Enterprise.