Download & Install

I have question
I downloaded the full game from direct link (mirror 2), extracted it, and counted the folder size
It's only 77 GB, despite it's patch 284.104, and all maps included (without the need to download separate maps)

This make me confused, since Reloaded release have 90+GB size while Codex Release 100+GB size, while both of them missing maps and not in patch 284.104

Any explanation about this?