I didn't check the Carnival Vista. If you read my original post (they one you originally responded to), I only researched
RCCL, NCL, Celebrity, Princess and Holland America. I compared stateroom categories and square footage for the type of room best suited to my family's needs.
BTW, thanks for the tip about the Vista. I just checked it out and it looks fantastic. However, they won't be in Europe in 2017 (just this summer). We aren't able to do Europe this year, so we have to wait until next summer. If they did European itineraries in 2017, I would definitely consider the new Carnival Vista as an option.