Keep in mind that on paper (or pad) a galaxy class might have the edge, but a battle is won by tactics, not strength. I'm not saying that Janeway and the crew of Voyager would beat Picard and the crew of the Enterprise, I'm just saying that technology is meant to give your side an edge, not a definite victory. Combat is about pitting your strengths against your enemy's weaknesses, while minimizing the exposure of your weaknesses or allowing your enemy to use their strengths.
So basically Voyager is screwed.
Figured that was how it was going to end.