His left arm is short, elbow should align with a waist - compare to the right hand.=) And something wrong with arms muscules.
Maybe get rid of those dark lines. And left arm also has incorrect muscule group - you wouldn't be able to see triceps from this position.
And hands are different by width. The otherwise looks good.=)
Hope you wouldn't mind:
But I'm no expert, do not trust me, most of the time I have no idea what a hell am I doing.=))
To be honest, I like the lineart guy more, it has live dynamic feel in his pose.=)