Angular is about seven times faster than AngularJS, with built-in extensions that allow running applications on the server side (including SEO) and synchronization with client data. AngularJS doesn't have the lazy loading feature Angular has that imports components only when required, speeding up loading times. However, not all professional web developers are familiar with Typescript, Angular's programming language, so you need specialists to create apps using this framework. Moreover, older browsers don't understand Typescript, requiring its conversion to Javascript.