We cruised the Conquest a couple of years ago and will be cruising the Voyager in 2 Monthes. We liked the Conquest, but we preferred the Carnival Legend, easier to get around on. We haven't been on the Voyager yet but, from what I have seen and read there is much more to do on the Voyager than the Conquest. Don't get me wrong, both are awesome!
Which ever you chose, treat yourself to one dinner in the specialty reastaurant. I t will cost you 25-30 dollars extra but is WELL worth it.