Call the sale department and setup the demo and see it yourself, they'are all great. Most trouble I found in any cad/cam is find the nice good post processor for your the machine you have in house. As far as Cad, I would say it's is about the same just that everyone has their own reference/opion ways to do thing. So it doesn't mean one recommend this software and the other one is not for you...... have a demo and take a look.
Some thing to watch for is
1. What is the mantaince fee/year?
2. Post processor libarary for your machine?
3. How good is there support team?
The best way to learn is trial error.