1.
Angular 2 have better performance
then Angular 1.
2.
Angular 2 is more powerful
templating then Angular 1.
3.
Angular 2 provided Lazy loading.
4.
Angular 2 provided simpler APIs.
5.
Easier debugging.
6.
Improvement over Dependency Injection.
7.
Angular 2 is much more testable the
Angular 1.
8.
Angular 2 provided to nesting level
component.
9.
Angular 2 provided the way that is
two or more systems work together as a combined system.
For more detail about it. go to below link
http://angularjs.blogspot.in/2015/08/angular-1-and-angular-2-coexistence.html
- Integration of Angular 1 and Angular 2
- What are major changes in Angular 2?
- Why Angular 2? Why not Angular 1.x+?
- New Features of Angular 2
- First app with Angular 2 and ES6
- Forms in Angular 2
- ng-for loop in Angular 2 example
- What is ECMAScript ES6?
- What is Traceur compiler?