Actually Christian, There is (I believe) only one X-Carve. There are indeed many versions of Shapeoko, of which there are two decendents of the next generation of 'hobby level' machine. The Shapeoko 3, and also the X-Carve.
I happen to own both, but I have used the X-Carve for a dozen projects, and the Shapeoko3 for NONE.
The difference is the 'tool path' or in a rookies words, the software path that has to be committed to and processed before the first chip is cut.
I have seen Eslicam online in videos, and it appears to be more sophisticated and at the same time simpler than the software provided by Inventables, or Carbide. I think either company would do well by taking your (or another company that has this figured out) and implementing a version of the software that would drive and empower their machines) and incorporating it into their own software.
Now don't get me wrong. I think Easel is great ... but it is not as sophisticated as Estlcam ... so why not work together to enhance the entire universe. And at the same time, turn current Estlcam customers on to the X-Carve. It's a win-win. And I don't at all mean to minimize the talents or efforts of the Easel team. They are doing a really good job in user interface and simplicity. It just seems that Christian has some things worked out that would be a great addition to OUR software.
I really liked the work I saw that allowed an internal thread to be formed on a part.
The industry is expanding rapidly. I think some of the things that this software can do are an even bigger reason for that evolution in technology.
And no, I'm not German or whatever Christian is, and I'm not a paid agitator. This software just looks really good to me, and I would have already purchased it, but it appears to be PC only, and not MAC, so I have not tried it yet.