Does outlining fonts make them thicker?

I am creating a corporate logo that will be distributed to dozens of offices for use across multiple platforms and applications, so the logotype (corporate name) under the brandmark (graphic/icon) will need to be outlined.

I understand that mechanically they are the same... I can take an uppercase (live font)  light blue 'A' and place it over a matching (outlined font) yellow and the lines match exactly  (and I get a green 'A').  But when I review printouts, the outlined version of the logo is thicker than the live text version  (I'm using an Avenir font, btw).

So maybe my issue is with either the print device or the Postscript language being lost when the font is outlined... but it even looks different on-screen. Input welcomed. Thank you!