I love the brightness and detail of the newer piece, but i also deeply appreciate the humor of the first. I find myself giggling childishly at "obey the law or we blow up your house." Quite brilliant on equal parts.
I think it's a fun concept, the idea of a city of tightropes. Everyone always likes sky cities, cities in the clouds, cities in the canyons, etc. And the perspective in the image is nice. The guy's just out for a stroll in the city, except in this city you get to walk on air.
Gorgeous! I really love the personality you managed to give the background and environment It feels more urban and steampunky now as opposed to the simple generic futuristic buildings you have in the 'Before' image. Great work and best of luck in the contest!