Ampersand.js vs Marionette: What are the differences?

What is Ampersand.js? A highly modular, loosely coupled, non-frameworky framework for building advanced JavaScript apps. We <3 Backbone.js at &yet. It’s brilliantly simple and solves many common problems in developing clientside applications. But we missed the focused simplicity of tiny modules in node-land. We wanted something similar in style and philosophy, but that fully embraced tiny modules, npm, and browserify. Ampersand.js is a well-defined approach to combining (get it?) a series of intentionally tiny modules.

What is Marionette? Make your Backbone applications dance. Marionette brings an application architecture to Backbone, along with built in view management and memory management. Backbone.Marionette is a composite application library for Backbone.js that aims to simplify the construction of large scale JavaScript applications. It is a collection of common design and implementation patterns found in applications.

Ampersand.js and Marionette belong to "Javascript MVC Frameworks" category of the tech stack.

"Open source" is the primary reason why developers consider Ampersand.js over the competitors, whereas "Uses Backbone" was stated as the key factor in picking Marionette.

Ampersand.js and Marionette are both open source tools. Marionette with 7.15K GitHub stars and 1.35K forks on GitHub appears to be more popular than Ampersand.js with 818 GitHub stars and 52 GitHub forks.