Whether Roblox or Minecraft is "better" depends entirely on what you value in a game. Minecraft excels at open-ended creative building with minimal guidance—you place blocks in a persistent world with simple survival mechanics, appealing to players who want sandbox freedom and exploration. Its gameplay loop is intuitive, and it runs well on modest hardware.
Roblox is a platform hosting thousands of user-created games rather than a single game. It emphasizes social experiences, scripted adventures, and variety—you might play an obby (obstacle course), a roleplay server, or a developer's unique creation, often within the same session. Roblox shines for players who enjoy community-driven content and frequent novelty.
Minecraft typically offers deeper single-player depth and creative control, with better performance and lower system requirements. Building, redstone contraptions, and exploration feel more deliberate. Roblox offers breadth—infinite game variety and lower barriers to playing with friends casually.
For pure creativity and building: Minecraft. For social variety and trying different games: Roblox. For younger players seeking diverse, quick experiences: Roblox. For players wanting mastery over complex systems: Minecraft. Neither is objectively superior—they serve different preferences.