Sodium C14-C16 Olefin Sulfonate is supposed to be more gentle than C12-C14, and I don't doubt it for a second, but I haven't actually compared the two myself or anything.
I do know both are more harsh than SLES, which actually isn't so bad as people make it out to be. I personally prefer it as my scalp had issues with a lot of milder stuff. Yes, issues, very bad ones.
Compared to SLS, it should be similar or slightly milder. Of course, formulation is key...
If you're going to try either I'd go for the C14-C16.
Originally Posted by squalene
Very helpful post. Thanks.

Same to you Corrina. I'll have to look at the ratio of moisturizers to sulfonate.
3A - C, HP, ME, HD. (Coarse, High Porosity, Medium Elasticity, High Density.)

CG since Nov. 2012

Poos: SM Moisture Retention + Yucca Baobab, TJ's Tea Tree Tingle
Condish: TJ 'sTea Tree Tingle*, SM Moisture Retention* + Curl & Shine + Yucca Baobab, Yes to Blueberries
Stylers: KCKT*, SM Curl Enhancing Smoothie* + Curl & Style Milk*, KCCC*, FSG*, CJ Pattern Pusha, Curl Keeper
Sealers: Jojoba* or Grapeseed* oil

* = HG