Hydroponic nutrients are derived rom heavy metals and other nasty stuff. It is similar to food, some people eat crappy un-organic veggies and really horribly farmed and abused meat. and you have the people that eat all organic veggies and sustainably farmed meat.
If you are going for quality smoke then go organic, if all you care is about $$$$$ and you can keep telling yourself that your hydro bud tastes good and not like nasty burned chems. As well as taking one rip of the bud and it turning into a piece of coal instead of a white piece of ash. then go ahead with the WHYDRO.
good luck!