Stepcraft 420/2 WinPC-NC versus Galaad

Hello everybody,
I'm new on the forum and also a dummy 🙁 in the CNC world.
I have a new stepcraft 420/2 USB with WinPC-NC starter. The first tests were good.
I've already found out that this software is not enough. Because I want to go further and work with the 4th axis and want to create 3D models.
Now I must make a choice to purchase a full version.
The options are:
WinPC-NC USB full version for 420/2 or the Galaad also for the 420/2
What is the best choice and why?

Who has experience?
Friendly thanks.