Which one should I choose for my new Mobile App project?
NativeScript with Angular or
NativeScript with ts/XML?
What are pros and cons?
If you are familiar with frameworks like Angular / Vue Or at least willing to learn if your project timeline allows, you should go with one of the framework for the features set it offers out of the box.
If you are feeling very much comfortable at JS / TS, then you are good with NativeScript Core itself. End of the day all your code is just JavaScript and there is nothing like one could be done only with Angular / Vue.
The choice purely depends on,