And that is why you are still wrong. Those are simply two product grades for the External Link/Members Only. That fact that you don't know this indicates your lack of knowledge.
In addition, those products are both advertised as SDS, not SLS and SDS, which again proves you wrong.
If you are trying to argue that they are different due to impurities (which is still wrong), you are again wrong because the impurities are not only "remotely the same", they are very, very similar to the advertised chemical structure.
Now that is just not true, small changes in structure can have massive effects on the properties of a molecule. Methanol vs ethanol is a easy example. CH3-OH (Methanol) is poisonous, CH3-CH2-OH (ethanol) fun for a night out.
One is referred to as SDS (lauryl) = SLS, the unmixed forms are only SDS. Do all biologists follow this route? No. Do I wish they did? Yes, it would make replication studies a lot easier.
But back to the topic at hand. Can you tell when you got herpes? No, the latency period is so varied, people can live with it for years without showing symptoms.
Can you tell how you got it? Not entirely, HSV1 will happily live in both ends, but does show preference for the mouth. HSV2 shows strong preference for the genitals.
Are the tests accurate? Generally speaking, no. A lot of the commercial tests lack accuracy and specificity, throwing in the similarity between the two strains causing cross reactivity. There are more accurate tests, but they're often not used due to cost. Clinical diagnosis is more common over lab. They're also highly innacurate till 3 or 4 months have passed for the common ones (but that is a common incubation period).
Fun fact, chicken pox and shingles are both caused by another herpes virus. There are a group in the family of herpes viruses.