I went with Alcon Rotors (front only) for this upcoming track season (road course). I really liked my AP rotors on my 2014 Black Edition back in 2016 & 2017. I had the AP paired up with Gloc R12, R14 and R16 eventually. I chose the Alcon's after reading up on them and the lower cost.
Last year, after getting my 2017 GTR I stayed with the stock OEM rotors. I had gotten some life out of my 14's OEM rotors back 2015 through part of 2016, but since I went up to a more aggressive pad over the course of time... the 2017's OEM rotors cracked completely through after 6 track days. NOT attempting that again.
I'm curious if anyone else has tried both these rotors and if they noticed any difference. If you don't know already the Alcon's are significantly cheaper given you don't have to replace the hats.
I had HUGE balls back in 2016 when I went to the AP rotors, because of the substantial difference in braking. I'm looking forward and hoping the Alcon's will perform similarly.
This was the second day on the AP rotors. 154 mph to 110 mph on the curbing. Super dumb and awesome at the same time.