aptly vs Gemfury: What are the differences?

aptly: Swiss army knife for Debian repository management. aptly is a swiss army knife for Debian repository management: it allows you to mirror remote repositories, manage local package repositories, take snapshots, pull new versions of packages along with dependencies, publish as Debian repository; Gemfury: Private ruby gem hosting. Hosted service for your private and custom packages to simplify your deployment story. Once you upload your packages and enable your Gemfury repository, you can securely deploy any package to any host. Your private RubyGems, Python packages, and NPM modules will be safe and within reach on Gemfury. Install them to any machine in minutes without worrying about running and securing your own private repository.
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aptly and Gemfury belong to "Hosted Package Repository" category of the tech stack.

Some of the features offered by aptly are:

• Mirror repository
• Take snapshot
• Publish your packages

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

• Gemfury works with RubyGems, Python packages, NPM modules, and all compatible frameworks and services.
• Authenticated Repo-URL keeps your private packages safe and secure during deployment. All management and deployment is done over SSL.
• Do everything you need with just a few terminal commands.