When comparing SublimeGit (via Sublime Text) vs GitHub Desktop, the Slant community recommends GitHub Desktop for most people. In the question“What are the best Git clients for macOS?” GitHub Desktop is ranked 12th while SublimeGit (via Sublime Text) is ranked 28th. The most important reason people chose GitHub Desktop is:
This is the official GitHub desktop client built by the GitHub team.
Ranked in these QuestionsQuestion Ranking
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 Great GitHub integration
This is the official GitHub desktop client built by the GitHub team.
Pro Simple, streamlined GUI
GitHub Desktop uses an extremely simplistic two-panel view. It's not capable of complex historical visualisations like other GUIs, but it is very easy to use (especially for git novices).
Pro Supports pull requests
In addition to being able to seamlessly and easily integrate with all of GitHub's features, it also supports forking and submitting pull requests on any open source project hosted on GitHub.
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 Limited
Can't handle complex tasks. The Help Manual advises to use command-line Git instead.
Con Does not support multiple Remotes for a repo
Only allowed to assign one URL as remote. To manage/sync/fetch other remotes, use command-line Git instead.
Con Overly Simplified UI
UI that is designed not to support the needs of power and enterprise users. Management of more than five repos is next to impossible.
Con Buggy
Poster child for authors' programming ideology (FRP), likely the cause for the odd quirks and bugs it has.

Con Not free/libre
This application is proprietary, and thus cannot be modified or freely distributed.
Con No Linux support
There's no Linux version of this client.
Con Non-GitHub repositories are not fully supported
Since this is mainly a GitHub client, other repositories are not fully supported and with as many features and setting up a repo hosted anywhere else but GitHub is troublesome.
