I like the second composition better. The sky is blown out in both photos and there is less sky in the second composition to distract me. I love the reflection.
If I were there taking the picture and had time to try to improve it, I'd have tried bracketing the exposure to see if I could get everything I wanted between the edges of my histogram. If I couldn't get the range I wanted, I'd try one of two tricks.
The first trick is to use a piece of equipment called a split neutral density filter. It's darker on one side and lighter on the bottom. If you put the dark side on the top and adjusted it so that the dark part covered the sky, you could get both the sky and the rest of the picture exposed properly. Because of the trees and monorail track above the skyline, this might not work well because parts of them would be darkened as well.
The other trick requires a tripod. With a tripod and a non-moving subject, you could make two copies of the picture, one exposed for the sky and the other exposed for the rest of the picture. There are lots of software packages and techniques that allow you to merge the two pictures together into a single, perfectly exposed picture.
With all that said, I love both of them and wish I'd been there to take them.