error 1962 penny

Here I have a 1962 Lincoln Penny. On one Penny, the letters and numbers are fatter than the other one. I would like to know if this is a error for this penny.I posted two penny's side by side to let you all see the difference. Please let me know what you think.

 

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Hard to tell since I can't zoom on the picture. Either normal wear or die deterioration. Not an error.

 

The one has just been circulated a little heavier than the other.

 

is this 1962 a error the letters are sloppy and not in line