[bpracer]

I disagree a bit with some of your points:

"The next thing I noted was the diameter. Overall not as important but the Wilwood has the advantage in that department. "

Not as important??? The same caliper on a larger diameter rotor has more leverage. Kind of important.

"Also note how Wilwood has taken the time to "knife edge" their vanes vs. the other brands. I thought that was neat to see as well."

...and on the other hand the greater number of vanes in the AP rotor is more important. The way Willwood finishes the rotor edge is a bit cheaper process in my thinking. The AP is purpose built to one size, the Willwood casting diameter is adjusted by machining the outer edge. The actual cross section of the vanes is also important. IIRC the AP has a aero cross section. Willwood does make a higher vane count rotor but not part of this kit.