The XS Max was about 40% faster than the Note 9 on Geekbench 4 benchmarks. That's significant. The A12 chip is the real deal, and it will open up a lot of possibilities in the future. I know this upgrade doesn't feel like all that and a bag, but give it time, the magnitude of the A12 bionic and the GigabitLTE will be huge.
https://bgr.com/2018/09/18/iphone-xs-max-vs-android-benchmarks-review-says-apple-wins/
https://bgr.com/2018/09/18/iphone-xs-max-vs-android-benchmarks-review-says-apple-wins/