CoolKid

Hey, long-time watch enthusiast, first time replica buyer here. Why do so many AP replicas have movements that are 8 beats per second when real Royal Oaks only have 6 beats per second? Are lower-frequency movements not cheaper to produce and thinner? I know that the frequency is not the only factor that makes a second hand have a smooth sweep, so does a 28800vph replica have the same sweeping motion as a real Royal Oak? Thanks for the insight.