placement of holes 3 3/8 vs 3 1/2

A home owner from columbus ohio says:
The 20-014 and the 20-010 are, at first glance, the same except for the color. However, the 20-014 have holes spaced 3 3/8 inch apart while the 20-010 are 3 1/2 inch. Did someone make an error in measuring, or do they have different hole placements?
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Tom from SWISCO responded:

Hello! There is no error, actually. The 20-010 hole spacing does measure 3-1/2" on centers and  the 20-014 is indeed 3-3/8".

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