So it's more of a superstition sort of thing? Or if it actually does affect the performance, how so?
It is hard to really know for sure because of three things: 1. Placebo effect. 2. Small blade sample size available to most people. 3. Confirmation bias. Those are three pretty important ideas, and as a junior player it is quite possible you haven't encountered them in school (I didn't learn them until university). You can read more on Wikipedia, and I recommend it because these are really useful ideas for critical thinking skills for life in general, not just TT.
It comes down to this: I have owned a bunch of Viscarias, but to compare a scaly one to a regular one, it should be a blind test, and I should not know which blade is which, and there should be quite a large number of blades of each group to compare (say 6-10 in each group). This is because people tend to believe a certain thing based on a preconception and tend to ignore observations that go against the expectation, while remembering the ones that support the preconception. They are not intending to be biased, it is unconscious but people do it. There is a ton of research showing that people do this. Finally a small number of observations can mislead you because of random variation. That is why we need to compare quite a few scaly ones vs quite a few regular ones. And the scaly ones are comparatively rare. I have only had two I think. One was stolen.
So while people often say the scaly ones are better, the idea is out there on the internet, this is not something that is firmly established by any rational process.
So we don't really know if scaly ones are better.