An RN would be higher in the pecking order than an LPN. LPN training is actually about a year in length while RN training can vary from 2-4 years for a basic RN. 2 years for an Associate of Science in Nursing degree (3 years at some schools) and 4 years for a Bachelor of Science in Nursing.
Jobs differ for RN vs LPN and in some areas of the country differ for ASN vs BSN.