Unless they changed the formulation again, GFTN doesn't have dimethicone. It does have amodimethicone, which is a non-water soluble cone but doesn't build up the way dimethicone does. I've never used the Organix products, so I can't speak to the ingredients.
No two heads of hair are the same and for every person who gets amazing hair from CG there's someone else with amazing hair who doesn't follow CG. It all comes down to learning what does and doesn't work for your hair.
3a/f/iii Before the chop- Donated to Locks of Love, January 2013
Modified CG since 11/5/11
CO-WASH: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo
CLARIFY: CHS Treatment Shampoo (used prior to PT/DT)
RO: DevaCare One Condition, Regis Olive Oil
LI: Cure Care, As I Am Leave-In
STYLE: Re:Coil, Curl Keeper, Biotera Gel, Deva Ultra Defining Gel, GVP Liquid Sculpting Gel, Curls Rock Amplifier and Strong Hold Mousse
PT/DT: IAGirl's PT, One n' Only Argan Hydrating Mask