I agree with Atnas. I didn't even notice the two men at first. The guy on the right fits more in with the style, but I still like the green guy on the left.
If you want the man on the left to work better, look at why the one on the right fits more. Your left guy looks very unfinished right now, like more of a quick thrown together drawing than a finished piece. Again, the blurry jpeg doesn't help much. Clean up a lot of the black lines and as Atnas said, the face does not fit very well. It's almost as if you were trying for a more realistic style, at least with proportions, but stuck with a lot of your old more deformed style, which makes the man seem "off".