From what we can see Dual is not a block building game but more of a voxle sculpting game. There are still blocks and stuff you can place but it seems more that these are just the tools you use to get the shapes you want into the game instead of the only things you can build/place.
Im sorry but I have to say something about this (I know Im late on this but it bugged me). Dual Universe has blocks, in forms of the Cockpit, fuel tanks, and charge tanks, thrusters, weapons, etc., which you cannot change the dimensions of these blocks. Though voxle sculpting is the main focus, it also has building blocks.
blocks
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Im sorry but I have to say something about this (I know Im late on this but it bugged me). Dual Universe has blocks, in forms of the Cockpit, fuel tanks, and charge tanks, thrusters, weapons, etc., which you cannot change the dimensions of these blocks. Though voxle sculpting is the main focus, it also has building blocks.