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If I had to pick on any one thing, it's that the darker version is hard to see. You need to up the brightness on everything, make the brights more fluorescent and the darks less low-contrast.
Easy way to do this I think is to just reduce how hard the darkness filter is.
As for the pallete itself, it's kind of dingy and brown. That could work if it's supposed to be a kind of dead area but you should look into some extra colors for props.
For example, given the nuclear waste bits of broken road, fencing, machinery, ruined cars, and bent roadsigns would make for excellent set dressing and color variety tests.