For me react-native-navigation is better than react-navigation. And it is not just about performance. If you value native feel in your app, then there is no any other options for you, because RNN have built-in native features that your users will expect from you, like transition animation on back swipe, Peak and POP, or Shared transition (react-navigation have third party package for that, but third party means more issues). Without this stuff, your app will feel hybrid instantly. Not to mention that there is always a possibility that OS manufacturers might implement new native features that will be popular, and your react-navigation app will not be able to support it. Also I have an app with 100K downloads and RNN V2 never caused a crash in production.
For me developing with RNN is more enjoyable. RNN creates a new App Root for any screen or modal or overlay, so it is easy to implement and use components like snackbars or spreadsheets - you don't need insert a components everywhere you want to use it. You just imperatevely call a modal/overlay with navigation api from any part of the app and you don't need to worry about passing a redux method or reference to snackbar or modal.
From my experience with React Native - use native modules instead of JS whenever you can