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AO Multiply vs AO Overlay

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VanessaCeline polycounter lvl 2
AO seems to generally be used with the multiply blending mode as far as I've seen, however in Unreal Engine I made some comparisons and the Overlay node seems to give a better result. A value of 0.5 would be the original map, lower than that would be a lower intensity, higher would be a higher intensity. 

Is there any reason for not using overlay rather than multiply? I find that overlay gives more strength to the AO itself, while multiply makes the overall texture way darker and doesn't change the AO intensity as much as expected. Examples are below. 


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