Does anybody know the difference between the tennis shoes nike air zoom vapor 3 and vapor 4?

the number 3 and number 4

Does anybody know the difference between the tennis shoes nike air zoom vapor 3 and vapor 4?
here's a link to them on ebay
Reply:stick to k-swiss, adidas, or babolat shoes,


none of the others are as good
Reply:The Vapor 4 is the next generation of the Vapor line. They have the same essential features and benefits, but the look of the model is upated every other year to keep the line fresh.



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