difference is, halo mcc is not a simple fps/res bump.
campaigns have been remastered, new assets produced for campaign, terminals, completely re-done cutscenes from one of the top cutscene studios in the world, halo 2a has 6 completely remastered maps with next-gen visuals, 3 brand new and massive forge canvases (not to even mention the massive improvements and objects/pallets being added to forge) have been produced, new skulls (along with all originals) have been added, has 4.5k worth of achievements, has access to halo 5 beta and the nightfall series, and to tie it all up-> one unified user interface for a seamless experience.
In addition to all of the brand new featuers/assets/new wepons/vehicles, you get all the original campaigns and the mp (exactly the way each one was launched with their respective games).
