Bokey TimeHello everyone, this is Bokey Watch Industry. In this comparative review, we will bring you a side-by-side comparison between VS Factory and CLEAN Factory (C Factory) Daytona models. The two watches being compared are the Panda Daytona (Rolex m126500LN-0001) and the Black Ceramic Daytona (Rolex m126500LN-0002). Below, we will use text and images to show you the differences between VS Factory and C Factory Daytonas, as well as how to choose between their movements. Note: VS Factory uses the Dandong 4131 movement, while Clean Factory uses the Shanghai 4131 movement.
Frontal Comparison of Panda Daytona: On the left is the VS Factory version, and on the right is the Clean Factory version. Visually, the two are nearly identical—there are no differences except for the dial color and movement. In terms of color, Clean’s dial is slightly warmer, while VS’s is slightly cooler. The color difference is extremely subtle; you would need to observe them side by side for a long time to notice it.
Frontal Comparison of Black Ceramic Daytona: Again, with VS Factory on the left and C Factory on the right, the difference between the two Black Ceramic Daytonas lies in the color of the three sub-dials. The VS Factory version is slightly whiter, while the Clean Factory version is slightly grayer.
Disk other details comparison: bezel, hands and fonts are basically the same.
The grinding and chamfering treatment of the shell shape are consistent.
The strap is polished, both are relatively in place, and the clasp crown base is also polished.
There is no difference in the internal lettering of the clasp. In terms of coding, VS factory is 3XU, and C factory is M5X.
In terms of movement comparison: the left is the VS factory Dandong 4131 movement, and the right is the C factory Shanghai 4131 movement. We can see that the polishing of the Dandong 4131 movement on the lines is obviously more delicate than that of the Shanghai 4131.
And the splint of the Shanghai 4131 movement is darker than that of Dandong, and it is not a lighting problem here. We switched the positions of the two in the picture below and found that the Shanghai 4131 movement is still darker, which should be the gap in the coating process of the movement.
In the grinding process of the movement, both are bevel polished and chamfered. Here we can see that the chamfered and vertical lines of the Dandong 4131 are better handled.
In terms of lettering, it can be seen that the lettering effect of Dandong 4131 is better than that of Shanghai 4131.
In terms of shock absorbers, Dandong 4131 still uses kif shock absorbers, while Shanghai 4131 is still a false non-calorie cover (calorie is still available, on the back, as can be seen from the figure).
Comparison Summary: There is no difference in performance or repair rate between the Dandong and Shanghai 4131 movements—only differences in finishing. The Dandong 4131 movement’s finishing has reached the level of genuine Omega watches: its Geneva stripes are slightly less clear than Omega’s, and while the chamfering is similarly bevel-polished, it features vertical lines. However, the bridge treatment is less clean than Omega’s. For a watch movement priced just over 4,000 yuan, this is incredibly impressive! Additionally, the official VS Factory version is even several hundred yuan cheaper than the Clean Factory version. As for how to choose between the two? I believe you already have an answer after reading this. (Note: VS Factory also has a “trial version” with the low-config 4801 movement, priced over 1,000 yuan cheaper than the official version. For specific details, refer to Bokey next article.)
