When comparing Magit vs Kaleidoscope, the Slant community recommends Kaleidoscope for most people. In the question“What are the best merge applications for Git?” Kaleidoscope is ranked 9th while Magit is ranked 10th.
Ranked in these QuestionsQuestion Ranking
Pro Uninterrupted workflow for common tasks
Simple tasks, such as commits, can quickly be made without leaving the editor.
Pro Better visualization and interactive workflow
Pro Easy to remember mnemonics
You can easily learn the mnemonics for the most common tasks and use them to your advantage to speed up your workflow.
Pro Diffs are easy
Since it's integrated with Emacs, diffs are very easy to fix. You can jump right to any file you want to fix as soon as it comes up in the logs or in the status view.
Pro Multiple buffers are used to show contextual information
Pro Stage hunks or even just parts of a hunk using a single key press
In Magit staging a hunk or even just part of a hunk is very easy.
Magit also implements several other "apply variants" in addition to staging and unstaging. For example: you can also discard or reverse a change, or apply it to the working tree.
Pro Blame information can be viewed inline with the file
Pro Powerful rebasing
Pro Available in Homebrew
brew install magit
Pro Supports comparing folders
Pro Simple UI
Kaleidoscope has a beautiful and simple UI. It displays the two files that are being compared side to side, highlighting all the differences in a way that's easy to understand.
Pro Diff within a line
When working in code, line-by-line diff can still be hard to spot small changes within the line. Kaleidoscope will highlight what has changed.
Pro Image difference viewer
Kaleidoscope supports image diff viewer in addition to git diff. It's able to find even the slightest changes between two versions of the same image.
Con Useful only for people who use Emacs
Magit is only useful if your text editor of choice is Emacs. It wouldn't really make any sense to open up emacs just to run Magit if you use another editor.
Con Paid software
Kaleidoscope is not free, costing $69.99.
Con Mac OS only
Kaleidoscope is a Mac OS X only app.