Remember I used both in my VR (215/45R17). Asy2 first then HPY, and definitely HPY is more bumpy.HPY sidewall is harder than the Asy2???? That's not what I was told man!
Asy2 I remember using 35psi, HPY I use 33psi only.
For you, you have Yoko dB in 65 series, right? like 195/65R15, then switch to 215/45R17 sure you feel bumpy loh from 65 to 45.