When comparing Aptana Studio vs Komodo IDE, the Slant community recommends Komodo IDE for most people. In the question“What are the best JavaScript IDEs or editors?” Komodo IDE is ranked 20th while Aptana Studio is ranked 40th. The most important reason people chose Komodo IDE is:
Since Version Control features are very frequently used these days, having them built right into your IDE seems quite the right thing to do. With Komodo, you can perform your Git push-es and pull-s right while you're coding.
Specs
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Pros
Pro Available in standalone and Eclipse plugin versions
Aptana Studio has standalone (130.7 MB for Windows) and Eclipse-plugin versions.
Pro HTML5-aware code assist
Aptana's code assist displays which tags are supported by which browsers.
Pro Support for web projects
Aptana was specifically created for web application development. It supports a variety of languages such as HTML, CSS, JavaScript, PHP, and Ruby.
Pro Built-in terminal
Has a built-in terminal emulator from which you can run commands.
Pro Free and open source
Aptana is available for free under the GPL license with source code available on GitHub.
Pro Git integration
Aptana provides integrated support for Git to make collaboration and version control easier.
Pro Built in Version Control
Since Version Control features are very frequently used these days, having them built right into your IDE seems quite the right thing to do. With Komodo, you can perform your Git push-es and pull-s right while you're coding.
Pro Collaboration tools
If you're working with a remote dev team, you'll quickly realize the importance of code collaboration while programming. With the Komodo IDE you don't have to setup a separate teamviewer session, or even share code via dropbox with other devs. All you need is an ActiveState account (+ a partner with the KomodoIDE ofcourse) and your remote team could see LIVE and contribute to your changes in the source files of your app
Cons
Con Many dependencies
Aptana has a couple of dependencies to keep in mind.
It is built with Java and and has some requirements for the JDK version.
Aptana requires Git, and Eclipse 3.5+ if you are installing it as an Eclipse plugin.
Con No longer updated
Language support is increasingly dated.
Con Not free
Komodo IDE costs you $89 for a personal license. Even though they have a Free basic version (that's also opensource), but this lacks most of the functionality that the paid version has.