quality depends on ALOT of things. Hydro is not weed, its a method of growing, and personally i think organics is far better, for the better quality buds. there is no way of telling the method of growing, as far as i know. I thought all stems were hollow at first, cause how else would the water flow throughout the plant? they soon begin to close during the curing process, through my experiences. iF u want the better tasting weed, go organic, hydro is simply meant for a much faster growth, not neccesarily better quality.