At first I was going to vote for the concert one, due to it's clean execution and vibrant colors. But the more I look at this, the more I appreciate the work that was done on it. The Painitng style gives it a bit of a blurry feel but I'm willing to look past that :) Sir, you've got my vote.
As I see it, the construction of the mother ship is pretty much source (if im not mistaken) and I like that, also the color, the front ship is a bit distorted/ streched. The other is good too. Another tough game. Coin flip!