From the sound of it professional is our desktop version of SOLIDWORKS. We can still export STL and IGES. But the kick in the balls for me is the lack of simulation. That is what I need to improve designs. I already have ANSYS on my laptop but flow sim was way more intuitive sadly it seems like it's time to learn it. We can get that for free. MasterCam offers a home edition that although you can't export GCode you can validate a process (Not helpful for actual production).