KeystoneJS vs ExpressionEngine: What are the differences?

KeystoneJS: Node.js CMS and web application platform built on Express and MongoDB. Keystone is the easiest way to build database-driven websites, applications and APIs in Node.js; ExpressionEngine: Open-Source and feature-rich content management system. It is a flexible, feature-rich, free open-source content management platform that empowers hundreds of thousands of individuals and organizations around the world to easily manage their web site.

KeystoneJS and ExpressionEngine belong to "Self-Hosted Blogging / CMS" category of the tech stack.

Some of the features offered by KeystoneJS are:

• Express.js and MongoDB
• Dynamic Routes
• Database Fields

On the other hand, ExpressionEngine provides the following key features:

• Your site content is stored in channels—flexible data containers with fields for any type of information
• A Template may contain ANYTHING that a webpage might contain: HTML, JavaScript, PHP, whatever
• Live Preview

KeystoneJS and ExpressionEngine are both open source tools. It seems that KeystoneJS with 14.7K GitHub stars and 2.37K forks on GitHub has more adoption than ExpressionEngine with 183 GitHub stars and 46 GitHub forks.