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.
Both LPNs and CNAs are health providers in the nursing profession. While there are a number of differences between the two roles, the most significant differences between them are level of preparation, responsibility and pay. A LPN is a licensed practical nurse who is eligible to provide basic nursing care to patients. A CNA is a certified nursing assistant who works under the supervision of a nurse and performs duties that assist patients and nurses with daily routines.