Ha, you sound like some of my customers. I tell them that they are all digital but some manufacturers think that by using "digital" in the product name and printing it on everything they make will give them a sales advantage.
As far as real advantages, all I can think of is that most so called "digital" systems use one pair for each station as opposed to the much inferior "non-digital"
which uses two. A single pair can be used because the audio signal is not analog however the disadvantage is that you cannot use standard T/R devices but there are ways around this with some systems.
So this is really just a design issue with no real advantage from one to the other.
-Hal
[This message has been edited by hbiss (edited March 27, 2005).]