Sorry for any confusion! I originally intended this as an update to a previous post (years before we acquired GitHub) that had the title "From 20 to 2,000 engineers on GitHub: Azure, GitHub and our Open Source Portal", so was attempting to go for a good side-by-side comparison.

Post from 2015: https://jeffwilcox.blog/2015/11/azure-on-github/

I do realize it's probably very unlikely anyone here read that post. Happy to see if the OP wants to clarify better.