I am an LVN from California. Just recently moved to Illinois, where they are referred to as LPN. I know there is no difference in the scope of practice, however, it has to do with the type of education standards in the states you practice in as to how easily your license will be accepted in a different state. I was told my my professor in California that California, Texas, and Florida (I'm not sure if there was an additional state as well) are the higher standards for the educational requirements before you can take your boards. Therefore making moving to any other state FROM one of the above listed is an easier transfer. She then explained that should you transfer FROM any other state TO one of the above, you will have a more difficult process to obtain the license in that state. It seems those three states refer to us as LVNs. I would imagine that is the main difference (its in the requirements for examination more than anything). That would explain why the transfer spoken of above between Texas and California was seamless, due to the fact that they are both "higher requirement states. Once you are Licensed, there is really no difference. Just differs in the amount of hoops the states make you go through to transfer/attain initial licensure.