Good question. I understood that SNS is 10:1 ratio while Bulkpowders does use pure powder (so no ratio)? But not sure.
I've used BP and libido was nice at 3 caps, otherwise it was alright for strength, but nothing to write home about. However, it is tough to find the right dosage. I still have many caps left, so I guess I have to find out what the right dosage should be. But it definitely works to some extent.