Oh, yeah, they are the same size.... If Funzio comes out with a "Round" building- you will all be messed up!
I think there was a bug that was talked about a while ago about some people having 2 command centers. One big one and one small one. Looks like you guys are stuck with the big one.
These are the building sizes i know of:
Oil Derrick, Storage Silo
Guard Tower, Turret, SAM Turret, Railgun, Flak Cannon, EMP Cannon
Command Center, Supply Depot, Wind Farm, Munitions Stockpile, Bunker, Holding Cell
Armory, Communication Center, Space Center, Fortified Bunker
Steel Mill, Military Market, Robotics Facility
Air Field, Composites Factory, Diamond Mine, Weapons Factory, Ore Mine, Chemical Plant, Barracks, Electronics Factory
Electric Power Plant, Oil Refinery, Recycling Plant, Elite Training Facility, Nuclear Power Plant, Natural Gas Plant, Geothermal Plant, Nanotech Factory, Infirmary, Genetics Lab, Cement Factory, Oil Rig, Navel Research Facility
War Factory, Advanced Air Base, Satellite Array
Shipyard, Dry Docks
There wont be any round buildings. They don't even have rectangular buildings in MW.