Powerflex will simply use a run and speed command to make a lower torque move. Simply running a motor until told to stop.
Kinetix will use high torque and precision move commands to get it done. Instead of just start and stop with a speed reference. Its told exactly where to go and how to get there with each move being fully controlled in profile.
I just finished up my first Kinetix project last week. It was only a simple depositor machine but t was a damn good learning experience. It turned out to be much simpler to program the logic than I had thought before getting it started. No issues to speak of though after I figured out that I was running it way to fast in the beginning. These things will fly. The machine is super accurate with its dispensing as well!
You will like the Kinetix.