Zuiderdam or Coral?

We will be doing a Panama Canal in 2016. Unfortunately we only have time for a partial transit. Can anyone offer any comparisons between the Coral Princess and Zuiderdam? They both have plusses and minuses. We have been on Princess and HAL and loved both. Coral: not crazy about the itinerary with only a few hours in the morning in Aruba, no private island, and have heard mixed reviews about Cartagena. We can't sail until after her February refit and are concerned about crowding with 200+ more passengers in dining, buffet, elevators and pools, and the reduced public space with the removal of the Universe Lounge and reconfigured library. We also love a wrap around promenade that will soon be gone, so Canal viewing areas will be decreased. However, in general the Coral gets great reviews, Princess is always clean and well maintained, and we love MUTS. As for the Zuiderdam, the itinerary is much better with Half Moon Cay, Curacao and a full day in Aruba and she has the promenade and no crowding. But she still gets mediocre reviews on plumbing and upkeep, even after her 2015 refit. Being on a rundown ship for 10+ days is a deal breaker. We were on the Westerdam in 2011 and while we loved it, she was a bit 'shabby chic' and we nick named her the Rustydam. Our other concern is with no MUTS and not much nightlife on HAL, our nights might be a little dull. Also, Panama Canal lectures, cultural presentations and the actual Canal experience will have a huge impact on our decision. Thanks in advance!! ;)

For us, we decided on the Coral for two reasons:

1. We want a self service laundry facility available. The Zuidam doesn't have thisl

2. I am very sensitive to cigarette smoke. HAL allows people to smoke on balcony.

So that made the decision easy for us.