There are significant differences in design and quality between Cartier bracelets C and R.

1. Design style: Cartier bracelet C mark focuses on design, while Cartier bracelet R mark pays more attention to practicality and fashion.

2. Anti-counterfeiting engraving: On the inside of the Cartier bracelet, the original engraving is marked with the letter C, while the imitation engraving is marked with the letter R.

In general, Cartier bracelets C and R are different in design and anti-counterfeiting, and they need to be selected according to specific purchase needs. If you want to buy a bracelet with a unique design and a sense of fashion, you can consider the Cartier bracelet with the C mark; if you want to buy a practical and anti-counterfeiting bracelet, then you can consider the Cartier bracelet with the R mark.