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					Originally Posted by  AnemicOak
					 
				 
				According the Amazon the K4NT and the K3 are the same thickness??? (.34") 
			
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 The K4 has a rear end that sticks out more. Better design making it nicer to hold. I don't know how else to describe it. The K3 is the same thickness everywhere. The bezel isn't flat on the K4. It's a subtle change in design but makes a world of difference.