I played Roblox ONCE it was fucking horrid! It run at like 1 fps on my fucking ALIENWARE PC I Couldn't build SHITE as whenever I tried to place something it ended up across the fucking map. As For Minecraft It was amazing compared to Roblox It ran fast. I could go for a challenge, or relax and build whatever the hell I wanted to. In the end here is my ratings for each Minecraft 100 Roblox 000