When comparing Git Extensions vs Sublime Merge, the Slant community recommends Git Extensions for most people. In the question“What are the best graphical git clients for macOS / Mac OSX?” Git Extensions is ranked 10th while Sublime Merge is ranked 11th. The most important reason people chose Git Extensions is:
Developer focused and powerful options
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Comprehensive interface
Developer focused and powerful options
Pro No registration at all
Doesn't require registration to use.

Pro Free/libre
This application is FOSS, and thus it can be freely modified & distributed.

Pro Plugins
It comes with many plugins and you can build your own. Included by default are some very neat visualization tools for Repository metrics.
Pro Easy to add add action in the GUI
Right click to add a script to delete remote branch or tag...
Pro Pure Git behind the scenes
All actions are real Git actions which minimizes confusion and makes it perfect for beginners and professionals alike.
Pro Speed
Nothing is faster. I used to use Gitkraken, but on large projects Gitkraken is barely usable.
Pro Very keyboard friendly
All actions have either direct hotkeys or corresponding entries in the palette (same as Sublime Text). This means a very streamlined and fast usage.
Pro No account info needed
No account- or server checkbacks (only for updates). All password handling is pure Git which means much less trouble and confusion.
Pro Portable version
Windows portable version.
Pro "Native" performance (Python based)
Very good performance.
Pro Using the trial version forever without limitations
Sublime Merge may be downloaded and evaluated for free, however, a license must be purchased for continued use. There is no enforced time limit for the evaluation.
Pro Lifetime testing
The product is paid but you can test for your life without paying (similar to sublime text).
Pro Excellent user interface
The user interface is designed excellently, and it's really fast to navigate with mouse or keyboard. It's never obscured which git commands are used, and commands can be modified/extended if desired. The visual appearance of the interface can be changed via themes, new git commands can be added, and even the menus can be extended.
Pro Not subscription based
A license gives you 3 years of updates, and you can use the product after that indefinitely.
Pro Bundled license available with Sublime Text (which is an amazing text editor)
Cons
Con Requires mono
Con Poor UI
Rich developer experience but awful interface.
Con Few plugins
A small selection of plugins.
Con Too expensive
And they're continuing to increase the price over the time, from the $60 that was at the start.
