[QUOTE] I guess I should have been more specific. I was just wanting to know which program was better for a machine design. I don't need to spend 10's of thousands of dollars. I'm not writing programs, nor am I doing complex surfaces, just plain old machine design. I also do gages and fixturing. For the money is one program substantially better than the other?[/QUOTE] Ask the vendors you might be getting parts from what component libraries for which system they can supply you with. Then look at "special" features of each system that could aid you in any analysis or simulation tasks that might help you. Then consider what is lacking that you might find handy, if anything.