Spot the difference?

Ok, one of the shirts I am wearing is an original Calvin Klein. The other was bought off the street in Hanoi for $2.80. Can you spot the difference? I wear each shirt equally when working in Hanoi and to this day no one has made any comparison..........Hanoi is no Milan when it comes to fashion but in my opinion you can get away with a hell of a lot for literally the price of a litre of milk. For me it is another thumbs up for life in Hanoi...............