Agree with Leigh
If you were to have a closer crop on the guy so the other one wasn't in it, then I think the B&W would work - only problem then becomes where is he looking? Without space on the side he's looking towards, it may become unbalanced (?).
The colour one is an improvement on the B&W as it currently stands, because it doesn't rely so much on the solitary nature of B&W - the colour actually makes the image busier, and you get a feeling of intensity despite the busy surroundings.
Not sure if this makes sense, it does in my solitary mind
