Since SLS transform my scalp into a perfect replica of the Sahara desert, I'm looking for a shampoo without it (no offense to those who live in Sahara :P).

I found a shampoo-bar by Lush, "Squeaky Green", which doesn't contain SLS, but Sodium Coco-Sulfate. I wonder, is this better than SLS? Is this a bit more... Merciful to the hair and scalp?