Ent D is a superior fighting ship to voyageur, hands down. While voyageur had quantum torpedoes, the Ent D was loaded to the teeth with photon torpedoes and had more launchers than voyaguer. More phaser arrays also helps. The saucer seperation thing also would be of big help, allowing the D to break into two targets if need be, also giving the drive section manuevering capabilities that would allow it to be more competetive with voyageur.
As for the crews: voyageur's sucks. Nearly all of the episodes went way beyond suspension of disbelief. They were stupid, always making stupid decisions and not paying any real price for them.
Janeway is not as good a captain as pricard
Chakotay sucks comared to riker
Torres isn't as good as jordi, not by a long shot
Harry is an elementary science flunkee compared to Data
Tuvok is a wuss compared to worf
Tom is alright, and since Ent D never really got an outstanding helmsman for any length of time voyageur has them beat here
Doctor would be spending all his time worrying about holographic equal rights and adding holographic appendages to himself, so crusher has him beat.
Summary- voyageur can't compare with the Ent D, and the crew of voyageur sucks donkey butt so it's a hands down Ent D over voyageur.