Some of these cleansers lather, some do not.  What is important with all sulfate free cleansers is that they need your helping finger pads to scrub it off your scalp while rinsing. They tend to build up on the scalp if you aren't thoroughly scrubbing them out.  If your hair is on the dryer side and with relentless frizz, choose a conditioning cleanser (non-lathering).  The exception to that rule is those curly girls with fine hair don't always fair well with a conditioning cleanser (otherwise known as a co-wash).  If you have finer textured hair, or enjoy lots of volume and don't have a ton of trouble with frizz/don't mind it because it gives you body, choose a lathering cleanser.