Comparison Why would anyone be in the healthcare field? First, there are different types of positions available. Second, this is a very rewarding career for those who enjoy caring for others. Although, most people think there are a lot of differences between certified nursing assistants and licensed practical nurses, they share the same type of work, working conditions and job outlook. The nature of the work is very similar for the C.N.A. and L.P.N. A C.N.A. work includes performing routine tasks under the supervision of nursing staff. They answer call bells, deliver messages, serve meals, make beds, and help patients eat, dress