That is true. D7200 is 3.92 and D500 is 4.22.
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The original post referred to the D7100 not D7200
However for all intents and purposes its not going to effect printing to any noticeable extent.
When I was working int he camera shop we had a wedding photographer that was still using a 12mp camera and the prints were better than any other professionals (in the same town) were producing with >20mp cameras