I can't help you with dupes (I like Deva stuff too). But, the no poo would be comparable to a cleansing conditioner. It conditions but also has gentle cleansers that don't dry your hair out. No poos and poos with gentle (non sulfate) cleansers are considered curly girl friendly.
2C/ Coarse/ Normal porosity/ SW Florida/ Salt & Pepper
Cleanse: CJ Daily Fix, JC Cleansing Cream, TJ Tea Tree Condish
Condish: JC Too Shea, CJ Curl Rehab (both as RO & LI)
Stylers: UFD CM, CJ PP, JC Spiralicious, Darcy's Cream Gel & Cocoa bean whip