A better analogy is the difference between an engine you assemble from parts you ordered from J.C. Whitney and one built by
Ed Pink.
The first is an amalgamation of "in spec" parts whose manufacturing tolerances are such that when assembled they will function (after a fashion). The second is meticulously handcrafted and fitted. Both engines will get you back and forth to work. One will get you into the winner's circle.
Another analogy is the difference between factory ammunition, "by-the-book" handloads, and ammunition crafted for a particular discipline with a particular rifle. For many practical purposes any of the three types of ammo will get the job done. But only one will get the job done when ultimate precision is required.
Personally, I don't mind paying $150 for my world-record-holding riflesmith to fit/chamber a $340 Krieger blank, even for my coyote rifle.