When comparing SublimeGit (via Sublime Text) vs GitX-dev, the Slant community recommends GitX-dev for most people. In the question“What are the best Git clients for macOS?” GitX-dev is ranked 4th while SublimeGit (via Sublime Text) is ranked 28th. The most important reason people chose GitX-dev is:
Allows for interactive staging of files or hunks and deleting of unstaged or non-git tracked files. Hunk size slider allows staging/unstaging individual lines, letting you stage pieces of a file easily.
Specs
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Pros
Pro Better visualization and interactive workflow
Diffing from the selected file
Pro Uninterrupted workflow for common tasks
Simple tasks, such as commits, can quickly be made without leaving the editor.
Pro Quick-commit encourages smaller commits/committing more regularly
Pro Visual commit mode
Allows for interactive staging of files or hunks and deleting of unstaged or non-git tracked files. Hunk size slider allows staging/unstaging individual lines, letting you stage pieces of a file easily.
Pro Fast GUI
Responsive even with thousands of files or large binary like files
Pro Understandable trees (branches etc.)
The visualisation of the development trees makes git a lot more useful. The command line is good for a lot, but trees are for GUI clients like GitX.
Cons
Con You have to be using Sublime to use this
Since it's a Sublime Text plugin, you have to be using Sublime as a text editor to make use of this in its full potential.
Con Git Pull doesn't work in ST3 on Yosemite
Con Clumsy staging workflow
The staging workflow in GitX-dev is kind of clumsy and unintuitive in the opinion of some. (others love it)