Brt,
You can also set up an online demo of the xp series stuff, so you can see what an amazing piece of software it is.
AS for the "common roots" more like seperate roots that crossed for a very short time, then one grew and the other well......
Spend some time and look thru the posts here to see what other user have to say about onecnc.
Here's a link to the new web site:
http://www.onecnc.net/index.htm