Explain to you about different settings and what is most effective? That is sort of like asking someone to explain about different types of kitchen appliances, and what the most effective kitchen tool might be.
Simply put, it is all about who is using it, what one is doing, and what one is capable of doing, versus what one’s goals may be.
Electrolysis can remove any color, shade, thickness, or grade of hair. All that is needed is someone who is handy with their equipment, and knows a little about how this process works. After that, one can get better, faster, and more comfortable treatment if one learns more about technique, and obtains better equipment, and dexterity in using these.
To answer your question as asked would be one of those instances of a lay person asking what the best automotive engine parts are, and why. The only way to try to answer the question would be to speak from the perspective of an auto mechanic, or researcher, and speak in the language of these professions. None of the information would translate.
We can’t get you to the point of being a “backseat driver” to your electrolysis provider. In the end, the person working on you is the best judge of what that person is capable of doing with the set up that person has, and the talents that person brings to the table.
It reminds me of when my grandfather was having a procedure on his prostate. I was mad the doctor used the older, more invasive procedure, instead of the quicker, kinder L.A.S.E.R. method. What I was not looking at, of course, was that this doctor did not have access to that equipment, nor experience using it, even if someone were to lend it to him. We got the best treatment that person could have provided on that day in time.