Cocoa (OS X) vs AngularDart: What are the differences?

Developers describe Cocoa (OS X) as "The Cocoa frameworks consist of libraries, APIs, and runtimes that form the development layer for all of OS X". Much of Cocoa is implemented in Objective-C, an object-oriented language that is compiled to run at incredible speed, yet employs a truly dynamic runtime making it uniquely flexible. Because Objective-C is a superset of C, it is easy to mix C and even C++ into your Cocoa applications. On the other hand, AngularDart is detailed as "A framework that focuses on productivity, performance, and stability". It is a leaner, meaner version of the framework. A number of conventions, services, and other code is part of Angular only to fill in JavaScript’s gaping holes in functionality.

Cocoa (OS X) and AngularDart can be categorized as "Frameworks (Full Stack)" tools.

AngularDart is an open source tool with 8 GitHub stars and 7 GitHub forks. Here's a link to AngularDart's open source repository on GitHub.