aero, in theory, grows faster and yields heavier...only because of the explosive root growth from the mass amounts of o2 to the roots.
however, o2 is o2 correct? with that being said....you should use air pumps and other things to keep the nute soup flowing in dwc/bubbleponics...so both systems get o2...just different means
well its kinda a problemb these days, go into most grow shops now and they will try to sell u a super cheap aero system that basicly spits globs of water out with a tiny pump that will burn out in around a year its kinda sad. worst thing is alot of peps get the idea that its true aero the dif being aero requires lots of pressure and very fine sprayers that get cloged easy due to the small size required to atomize the water.
In short thats why you see alot of dwc for small ops and usually some kinda flood/nft for your larger ones (i guess it wouldnt b hard to put a sprayer in some kinda small dwc, the pump cost would b kinda retarded for the amount of plants though. hince why they just throw a airstone in the bitch and filler up, works just fine.)
so id say dwc for less than 10 and flood/nft for more than 10