Polymeter vs. Polyrhythm
https://www.youtube.com/watch?v=OkuYmD6zs8o
It seems to make sense.
The guy repeats himself a lot. But as he says it's not just Arturia who mislabel polymeters polyrhythms. Most people don't really know what polyrhythmic music is. Interestingly, Squarp give Pyramid users an option to run in one or the other, but not both.