CD version
Origin version
Its just an .exe that you use to replace the existing .exe in wherever you have the game installed. The patches also include a widescreen fix. This is the only WS fix that works for me (HUD and menus are still 4:3 but that is a minor issue).
The CD version patch includes a no CD fix and I believe both CD owners and Origin owners can see the same servers so we will be able to play together. I used Origin since Im too lazy to fiddle with CDs.
No Punkbuster required, supposedly not even a CD key. And my favourite: remember when you got disconnected/kicked or you simply wanted to end the current game when there was an unnecessary loading screen (a helmet under a Tiger) before you could exit to menu? Well that no longer happens and if you delete the movies in Movies folder you can be in and out of the game in matter of seconds.
Some screenshots I just took:
Widescreen/fullscreen@1920x1080 (right click>open in new tab to view images)



So who wants to play?