Ian,
As Doug has pointed out Pure Clean is made up of sodium tripolyphosphate which is the main ingredient of every microsplitter like solutions or one-step so the difference is minimal, you will need the same agitation as ms depending on fibre and dirt level.
Chemicals like m-power and nemisis should require less agitation due to the active ingredients normal ms dont contain, I find they out perform ms easily and keep working after you have left. But, like Doug I know what works and when to use it, so experimentation is best to find what suits you.