issue of Pi is WIndows10. Win10 is very lazzy compared win7 on Ryzens Superpi results. U can check it with older Ryzen on new OS Win10 .
Seesm, in windows 7 are Pinnacle and Matisse clock to clock very similar in SUperpi, maybe new Ryzen is slightly better (but not much). FOr Win7+Matisse I know only use X470 board. I saw also few tips to get x570 for Win7. But...