Looks like the same kid to me. The quality makes it too difficult to tell much of anything. The teeth could just be the lighting, the turn of the head, the position of the lips, or anything.
Now try this one (but don't let the obots see it.)
Is the little boy in the above image the same little boy as in the image below?
Notice, the lighter coloured boy also appears to have the receding hairline on one side...