Sodium Coco-Sulfate is a slightly less refined version of Sodium Lauryl Sulfate. It's at best slightly more gentle than SLS and should remove anything a sulfate shampoo would. Although technically a "sulfate free shampoo", I wouldn't necessarily consider it to be CG friendly either. Other than the sodium coco-sulfate, it's a nice shampoo, so I wouldn't chuck it. If you do find it to be too harsh, you can dilute it or save it for clarifying.
Yes to Cucumbers Color Care (round bottle) is the older formula with Sodium Coco-Sulfate. Yes To Cucumbers Color Protection (rounded rectangular bottle? definitely not a cylinder), is the newer formula. It has a couple of gentler surfactants (foaming /cleasing ingredients), along with Cocamidopropyl Betaine. The Cocamidopropyl Betaine will remove even non-water soluble silicones, and should remove all but very stubborn buildup (such as polyquats, which some find require a sulfate shampoo to remove).
CG since 11/2011
2c /3a F /Mii, low porosity
Autumn Products /Routine:
Clarifying: Herbal Essences Tealightfully Clean, Suave Professional Deep Clean Peppermint
Low Poo: Renpure Luxurious Argan Oil
Co-washes: VO5 Kiwi Lime Squeeze or Strawberries & Cream
RO: Tresemme Expert Selection Perfectly (un)Done, Cure Care, VO5 KLS
LI (if needed): Tresemme Perfectly (un)Done, VO5 KLS, Cure Care
Stylers: FSG, L'Oreal Clean gel, Tresemme Flawless Curls Bouncy Curls, LALSG, HETT, AIF
PT: IAGirl's as needed