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.
1. RNs receive a higher salary than LPNs. Money likely wasnât the motivation for your decision to become a nurse, but finances can be hard to ignore, especially if you have a family. Put simply, RNs generally earn more money than their LPN counterparts. In 2010, RNs received an annual median wage of $64,690, while the median wage for an LPN during the same time period was $40,380, according to the Bureau of Labor Statistics (BLS).