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.
LPN is a Licensed Practical Nurse and RN is a Registered Nurse. The main difference that can be noticed between LPN and RN is in their duties and practice.A registered nurse is one who has graduated with a 4 year nursing program with a Bachelor of Science degree or a 2-year nursing program with an Associateâs Degree.he RNS can administer medicines, develop and manage nursing plans, assist physicians in examinations and treatments and take independent decisions. In Hierarchy, the RNs are above the LPNs. Another difference that can be noticed between the LPN and the RN is their salaries.