Aida Maria v Nemo III

My friend and I are both looking at going on a western itinerary (circling Isabela) with the Aida Maria and the Nemo III. The dates are similar, except that the Aida Maria adds one day to go to Puerto Villamil (6 day trip), whereas the Nemo III is a 5 day trip. We are torn between the two, as we've heard positive thins about Puerto Villamil, but think the Nemo III looks like a nicer boat and would use the extra day to spend in Santa Cruz/as a buffer in case air travels go awry.

Anybody have thoughts on either boat/itinerary? Aida Maria is itinerary F, Nemo III is itinerary A5.

Thanks,

Andrew