It is also 4G storage, iPhone 12 is equipped with the latest A14 processor, XS Max is equipped with A12 processor, which is two generations short, and the performance is still a cut off, so the iPhone 12 runs better.
In addition, Apple will provide operating system update support according to the performance of the phone. iPhone 12 can install more versions of iOS, so the service cycle is longer and the use value is much higher than XS Max.