Angular2 vs Angular4

Angular 2 and Angular 4 Doesn’t have much differences, it’s just an update for the features that are existed in angular2.

Angular2	Angular4 / Just Angular
Angular2 application size is larger when compared to angular4.	Angular4 application is smaller and faster when compared to angular2 app.
*ngIf is not build with if/else syntax	*ngIf has if/else syntax that make sense when you are making ajax calls we can show loading within the page.
For changing a text to title case, we need to write our own logic.	Angular 4 has introduced a  new ‘titlecase’ pipe for converting first letter of each word to uppercase Ex: <h1>{{‘hello world’ | titlecase}}</h1>
For creating templates we need to use template property	New directive ng-template has introduced.
For animations need to import multiple packages and apply transactions	For animations we now have own package @angular/platform-browser/animations