I know sometimes I've smoked bud that almost had a fishy taste. Like they used fish emulsion for fertilizer.i don't think one method or the other is going to produce a stronger strain if both are given optimal conditions and are the same genetics, they should be pretty equal..
as far as taste, from what i hear nothing beats organic.. i have a good friend who lives in florida, and every single time she gets bud grown in hydro, she can tell it a mile away. the very first hit she's all, fuck this hydro shit bud, lol..
idk if i never had much hydro or what, but i can't really tell the difference myself..