I don’t have a picture that shows the Porsche rotor by itself but I did find one with it mounted on my car. Of course I didn’t find the problem until I had both sides fully installed and tried to spin the hubs.The problem was runout. The machining on the hats was very bad which caused excessive runout. I think he sources these from somewhere and then modifies the hat. I think he reduces the height, opens up the hub diameter, and redrills the stud holes, from what I could tell and remember from looking at them. I was also concerned about the limited number of bolts holding the hat to the rotor.
This is just my personal experience.
Steve