Except, unlike a typical knife, a bit driver's utility is almost entirely dependent on a separate item: the bit you put in the end. A cheapo Torx bit in a fancy titanium handle will perform the intended function worse than a quality bit in a cheapo plastic bit driver. A better analogy would be something like the Snecx Mono or Rexford RUK (or any other "fancy" knife/tool that uses standard replaceable razor/utility blades) compared to a generic utility knife that uses the same blades.
I should also point out that most GSKs aren't even sharp, so they don't actually provide adequate performance for their intended use.