Not a lot, to be honest. Most people won't have a clue what they are anyway (which may be an advantage, because they sound better than they are). People here often ask if the ATPLs are equivalent to a degree, but they're not. Lots of information to remember, but not much deep understanding.
FWIW, I'm doing a part time degree - one year is supposed to be a minimum of 750 hours study, and it takes three years to get a degree. ISTR that the ATPLs are also supposed to be a minimum of around 750 hours study? That would make them equivalent to the first year only, sounds about right.