In My experience with RS since 2021, both X and X1.
PC6 was the best.... but noisiest, suits X but bit X1 as X1 is way more silent
AdvanDB v552 has best balance of noise and grip
Primacy4 is excellent in humm noise and frip but potholes response is very ordinary. Love its tread though. Best on wet road as well.
If one try i can opt for other than AdvanDB, its 100% PC7 or Primacy4 plus. . Dont forget, advan has one huge advantage in Pakistan.. u can find a single tyre as well most of times ... in case of bad luck with punctures.