The Remastered version, which the CODEX release is based on, provides a massive graphical leap over the 2007 original:
Weaknesses
Regardless of the version you choose, Modern Warfare Remastered offers significant visual and technical upgrades over the 2007 original: callofdutymodernwarfareremasteredcodex better
The term "better" is subjective and depends on your specific needs—namely, whether you are looking for a seamless single-player experience or a functional multiplayer environment. The Remastered version, which the CODEX release is
Technical Analysis: Call of Duty: Modern Warfare Remastered (MWR) The Remastered version
He minimized the game and stared at his desktop. A single text file sat there, titled with the query he’d typed into a shadowy forum an hour ago.