Minecraft or Roblox ?

With all honesty, Roblox and Minecraft is too far from each other in terms of comparison.

Roblox offers more possibility in making games where you can script with lua, make models and mesh however you want it to be and sound files. Minecraft on the other hand, mostly rely on re-texturing. There are coding involved too along with plugins and mods. --but honestly, i think it's just pointless to compare these two.

Minecraft and Terraria on the other hand, would be the better comparison.