The top version is better, the other is not as contrasted I believe. The only thing I don't like is how you didn't take advantage over the city's original coloring. Japanese cities like the ones in your signature can have amazing colored lights, so that the only thing I'm not too fond of. Other than that, great job, Diamond.
I like the last one.. Clash makes it interesting and color of the text looks sexy on it. I like the idea V4 IMO