Counter-Strike 2 features major technical improvements over Global Offensive, including a move from the Source game engine to Source 2, improved graphics, and a new "sub-tick" server architecture.

Nope, CS:GO 2 isn't a separate game. It's pretty much the next big update for CS:GO, often referred to as CS2 by the community. Think of it like CS:GO got a major facelift - better graphics, smoother gameplay, but at its core, it's still the CS:GO everyone knows and loves.