The "Call of Duty: Modern Warfare 2" Cross-Gen Bundle includes the base game and allows you to play on both current-generation consoles (such as the PlayStation 5 and Xbox Series X/S) and last-generation consoles (such as the PlayStation 4 and Xbox One).
It contains content 1-6 for the Cross Gen Bundle while the Vault Edition has additional add on which includes : The Red Team 141 Operator Pack and FJX Cinder Weapon Vault.