Primacy 4st is more silent but Prime 3 is more grip in dry and wet. Btw the soundproof of Mazda is pretty good, I would recommend Prime 3 with affordable price while better grip than Primacy 4st. Otherwise can consider Pilot Sport 4 but it is expensive though.

Any tyre brand even include China brand is better than the GT3 coz it is super old pattern which was in market around 20 years. Why Honda still choose it because it is super cheap OE supply to Honda.

MC5 is a complete rubbish tyre. I had this MC5 as my stock tyre and it is very poor performance and super duper noisy. The wet grip is totally sxck all time big and wheelspin as slow as 50km while driving in wet road. You can take Michelin, Hankook, Goodyear, Yokohama, Toyo or even some brand China brand like Giti also perform better than this MC5. MC6 the road noise is still higher than all brands I mentioned. Conti good tyre is CPC or CSC series but price is rather high.

Got budget go for Michelin, moderate budget can take Hankook or Toyo. These 3 brands are performing better than MC6.