Cocoa (OS X) vs Hydra Framework: 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, Hydra Framework is detailed as "A framework that simplifies development of complex applications (by Facebook)". It is a framework for elegantly configuring complex applications. It has the ability to run multiple similar jobs.

Cocoa (OS X) and Hydra Framework can be primarily classified as "Frameworks (Full Stack)" tools.

Hydra Framework is an open source tool with 1.17K GitHub stars and 50 GitHub forks. Here's a link to Hydra Framework's open source repository on GitHub.