Each of the three races plays entirely differently. The Terrans rely on versatility and mechanical units; the Zerg use overwhelming numbers and biological evolution; the Protoss utilize high-tech units and powerful shields.
To clarify, StarCraft II: The Complete Collection is a popular real-time strategy game developed by Blizzard Entertainment. It includes the base game, expansions, and additional content. ElAmigos is a website that offers free game downloads, including this collection. Each of the three races plays entirely differently