I think you made a good observation about what’s in essence different between the Chinese style and the Japanese style. The popup coupons and confetti effects are all animations. Personally I find these animations highly distracting. Whereas if something is information dense but static, I like it.

(There are also non-store Chinese designs; they are not trying to sell anything so they don’t need coupons and confettis. These are actually enjoyable to use. And they are more information dense than the English equivalent because the Chinese script packs more in a smaller space. This of course makes such designs i18n-hostile.)