Faster refresh rates and more accurate ping reporting for dedicated servers.
Historically, this specific version of the game included several balance changes from the original developers, which were preserved in the TeknoMW3 environment: Shotgun Buffs:
If you use Steam, set MW3 to "Only update this game when I launch it" and then launch the TeknoMW3 executable directly, not through Steam.
: Ability to host local area network games without an active internet connection.