MC6 should be better than ATR Sport, not below ATR Sport.Achilles ATR sport it not that bad. Experienced it on a Suprima before, i believe its HP category.
MC6 and Ecopia are tayar pergi pasar compared to PS4 and ATR Sport. Not saying its bad but its well below Achilles ATR sport.
I would go for VR2 suggestion by going for all new alternative brand of HP tires.