Hey all, thanks for getting back to me. Yes, before I posted my topic I had checked the code via the Dev tools and also comparing the HTML and CSS source code side by side of each URL rendering. Unless I missed something each were identical.
I'm thinking Aaronms may be right concerning Codepen linking different assets and possibly some default font-size rendering for the body element or something of that kind. On the other hand the font-family is correct and they claim Debug mode is the authors pure code. I want to believe them as I really like Chris Coyier and his peers and have confidence in their stuff. I can't figure it. Probably something on my end.