More "Circus of the Sun" thoughts: - 'Ka' or 'O'?

Ok, so I am heading to Vegas again. It’s been a few years.

On the TopList of things to do is see another Cirque du Soleil show. I’ve seen posts here both good and bad about the shows. Personally, I think they are all fantastic so far. To credit: Mystère (twice), Dralion and Alegría (once @ Beau Rivage, one road show).

I do not think I will have time to see both shows and, for now, Zumanity is off the list (I’ve only got one night available for a show).

So Dopers, which would be the recommended show?

Since I haven’t seen either take my words with a grain of salt.

I’ve heard that “O”'s main attraction is the actual stage itself which fills and emptys with water in seconds. But the performances are ordinary.

“Ka” is more straightforward ‘Cirque’ with varied unique acts.

I’ve seen LaNouba, Alegria, and Corteo.

Has anyone heard anything good about the upcoming “Delerium” which is billed as a Cirque concert in an arena?

Ka is the one with the big huge moving tilting stage.