Hammer, come on over and you can a/b them.
I have two of the older ones, HankB has a new one.
If you get the new one, you MUST get the extra dedicated mixer also. I simply use a regular mixer when I need one.
This makes the older system quite a bit less expensive.
I've used both and it's hard to tell any difference in sound. The new one is a little lighter in weight, but negligible.
DonM