Many companies making products for curly hair have either not heard of CG, or haven't bought into it, so their ideas about what makes something appropriate for curly hair are often widely different. What really matters is the ingredients.

FWIW, when CG first came along, nobody was making products specifically to comply with Lorraine Massey's approach, including Lorraine Massey. The new (second) edition of Curly Girl: The Handbook mentions Deva products, but doesn't hype them, rather explaining what types of product formulations work with the method.
Peace,
Morgan

Baby Fine 3B, low porosity, normal density and elasticity
CGing since July 2008