I'm sure others have different experiences, but mine have taught me that soil is a waste of time compared to the yield you could get with the same effort growing in hydro. I have never had much luck in soil. Seems like too many things can go wrong. With hydro, just make sure the PH is adjusted and mix the nutrients according to the directions. Nothing can go wrong, at least as far as nutrients and fertilizer are concerned. No guessing, like I always was when I tried to figure out how much and when to fertalize my dirt.

And yes, you could easily expect your plant to be at least 1/4 size "bigger" than if it was in soil. Twice as big is more like it though. Bigger, faster growing, healthier looking overall, and most importantly higher yield. I spent years messing about with soil growing, then I started reading up on hydro. I thought many of the claims seemed unlikely, but I thought I would try a little hydro on a small (and inexpensive) scale. I set up a cheapo DWC and holy crap, I was blown away. I don't remember what strain I was growing, but I was used to the fan leaves being about as big as my hand. After switching to hydro they were about as big as my head (no jokes here, my head's average size for a 6 foot guy).

I am not a botanist, but consider that with hydro plants don't expend any effort searching for the things they need. Oxygen, nutrients, and water are all supplied directly to the roots. The plants can concentrate their efforts on growing the good stuff above ground. The smokables.

Just my opinion, but it happens to be backed up with a great many experiences.

And if you do switch, don't try and do all organic. You can get good results, but it takes more effort and fiddling. Just buy what works and blast your plants with chemicals. They love it. If you're worried about smoking chemicals, you can feed them only water the last two weeks. Please come over to our side.