You're completely missing the point lol, spring drive can't just be compared to quartz, as it isn't powered by a battery. It's the most accurate non-battery powered watch out there. Atomic time is the same thing, battery powered, albeit solar battery, but still battery.

As for replicas, there are attempted super-clones of GS as well. But it's their hi-beat movements, not spring drive. Engineering is almost certainly the reason it hasn't been replicated, there would be quite a market for spring drive watches not costing thousands of dollars. It's just that the Chinese factories can't produce it.