Infringement of the trademark right of the imitated trademark, whether you print R or not, is trademark infringement.

If it's just imitation, it's not exactly the same, but there are still some differences, and your own trademark is not registered, then there is a big difference between printing and not printing R. Printing R is a counterfeit registered trademark and may involve crimes. If you don't print R, you will infringe the trademark rights of others at most, and generally only involve civil compensation.

If your imitation is exactly the same, it is to manufacture and sell counterfeit products. Whether you print R or not, you have infringed the trademark rights of others, and at the same time you have committed a crime, and the problem is more serious.