I cannot cast a vote for either, because my answer doesn't come down to how the characters look, it comes down to what you are trying to create.
The military outfits make me think you might be going with a very serious tone; something along the lines of Maus where you are telling deep and important tales with an animal theme. In this case I'd say A; it has added detail and realism and looks darker.
But maybe you're going for something as dark and serious as Hogan's Heros. In which case, B.
The thing to bear in mind is that you are using an inking technique for your shadows; that makes your entire image look darker and dirtier. With that in mind, the real answer to your question is how dark, dirty, and serious do you want your comic to look? The darker and dirtier, the more details and shadows you want. The more lighthearted you want your comic to feel, the fewer shadows and details you want.
And by no means do you have to keep the amount of shading consistent. You only need to keep things relatively similar. This leaves you free to change the tone as needed for each page, or even each panel. (For best effect, try to keep it to pages over panels, as to avoid too sudden of a change.) So if you wanted to give a flashback of someone's happy childhood in the old country, you would have very light shading just done around edges. Then when they move into the harder real-world around them today, the shadows become stronger.
There's no rule that says you need to keep a consistent tone in your comic.
Above all else keep this single rule in mind: Think about emotion.
If someone was looking at your comic without being able to read, what would they suppose the emotion to be?
I'm looking at that fourth panel where the guard is pointing his gun at the civilians. I don't know the context of that scene. But with very strong shadows I'd assume it to be a heart-wrenching scene from a very dramatic piece. With very light shadows (and perhaps a few other details) I might take it to be a humorous exchange of an incompetent guard going overboard.
Try to make the comic something that can be followed without having to read the words in the bubbles. (To an extent.)
My webcomic: Mischief in Maytia