Humans have 1 heart and 2 kidneys. That doesn't make the kidneys inherently better.Like I said before I'm new to glass but this has one perc and others have more. Isn't more better?
Also, different percs do different things. Sometimes you want to minimize the drag of your pull. Sometimes you want to maximize diffusion. Each perc and piece is gonna do that differently, and everyone will have a personal preference as to which piece of glass works best with any given vape/method.
Especially for vaping, it seems like smaller pieces are a bit nicer because of vapor production dropoff making it hard to milk big pieces, or to get clouds that you can hold.
EDIT also, more diffusion tends to mean less flavor. For people like myself who love flavor, too much diffusion is definitely a thing.