It is definitely a voxel game. Both games also share the same core gameplay loop of mining blocks of materials and using those materials to build other blocks elsewhere.
The wikipedia page for the game literally says "The game is voxel-based (similar in some aspects to Minecraft, but with smooth terrain)".
The fact it doesnt look like one proves your point wrong. There are many other places in the voxel game space which are as yet untapped.
It is definitely a voxel game. Both games also share the same core gameplay loop of mining blocks of materials and using those materials to build other blocks elsewhere.
The wikipedia page for the game literally says "The game is voxel-based (similar in some aspects to Minecraft, but with smooth terrain)".
The fact it doesnt look like one proves your point wrong. There are many other places in the voxel game space which are as yet untapped.