RNs and LPNs take two different exams, the RN exam is more comprehensive and more indepth as compared to LPNs exams. RNs take NCLEX-RN while LPN take NCLEX-RN. In some states there are maybe different board of nursing that deal with either LPNs and RNs, example in California ther is California board of RN and Californa board of vocational nursing and phychiatrist Technicians. RNs study is more in depth, have alot more prerequisites as compared to LPNs.
RNs have more knowledge in psychology , clinical, assessment and management skills. LPNs work under direct supervison of an RN or a Doctor while RNs work independently under doctors orders. LPNs may not be allowed to do somefuctions such as initial assessment during patient admission or some procedures such as IV therapy, they may monitor IV therapy and report to an RN,while RNs have no restrictions. LPNs are usually in the nursing pool while RN do most of the management.
There is also a difference in pay. RNs make more money compared to LPNs. RNs have more career opportunities, while LPNs are more restricted on their choices. Most hospitals do not hire LPNs. Its also easier for an RN to advance in educations as compared to LPNs; there are more online schools and different specialization that an RN can choose. Some of the similarity between lpn and RNs are that they are closely regulated by the board of nursing and always have to be in compliance.