all else equal, the fresh undergrad is a tabula rasa, generally untainted by the habits from working for another employer. You have a real opportunity to train them and instill good practices.

in my experience, its very difficult to correct certain really nasty habits (e.g. style) but its easy to train new people in how to do things the right way.

though it should be said that it requires much more day-to-day intervention to deal with the kid, so its an investment