They are all the same you know 
Its my opinion Paul, I have tried them all, One Step, Easy Step, Craftex, Solutions, Pure Clean, I can't tell any difference and why should there be, there is nothing in them except sodium tripolyphosphate and they all contain this.
If you want to convince yourself they are all different that's up to you, I dont think I have ever read anyone say one is better than the other and that's after reading about 1.000.000 posts regarding Microsplitters.
Can I ask you what you think the difference is between Craftex & One Step?
Just curious.
Phil