But the tire speed rating system isnât without its quirks. For instance, the systemâs European roots give it unusual mile per hour maximums. Another such quirk is that the letter âHâ is out of place. Instead of appearing after âG,â it falls between âUâ and âVâ as does the speed to which it corresponds.
Among them: 1  RNs tend to have more responsibilities and independence in the workplace than LPNs. 2  RNs must usually complete more training than LPNs. 3  LPNs are in higher demand than RNs, nationally speaking.  RNs tend to earn more than LPNs.
RN vs RPN. RN stands for Registered Nurse whereas RPN stands for Registered Practical Nurse. RPN is also known as Licenced Practical Nurse (LPN) in USA. A registered Nurse (RN) is a nurse who has completed nursing program from a recognized university or college and successfully passed a national licensing examination.Nâs and RPNâs salary depends on the area they work. Obviously, RNâs salary is higher than RPNâs, and in Ontario, Canada RN can start at $22 per hour to $35 per hour. Nurse Managers and NPs (Nurse Practitioners), who have Masters degree can earn higher salaries. RPN salary in Canada vary anywhere from $17 to $23.