When comparing Git Extensions vs GitAhead, the Slant community recommends Git Extensions for most people. In the question“What are the best visual git GUIs?” Git Extensions is ranked 5th while GitAhead is ranked 10th. 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 Multi-platform
Windows, macOS, and Linux.
Pro All basic Git features included
Branches, Pull, Push, Fetch, Cherry-pick, Stash, Revert, Rebase...
Pro It is now free and open source
No longer requires an account.
Pro Qt-based
This means it is fast, looks great on any platform and integrates especially well with KDE.
Pro Fastest on Linux
Not based on web technologies and fastest to start and work with, yet featuring all required features.
Pro Designed to support repository exploration
Pro Can link to most used git cloud providers
Link to gitlab, github and bitbucket accounts.
Cons
Con Requires mono
Con Poor UI
Rich developer experience but awful interface.
Con Few plugins
A small selection of plugins.
Con GitAhead is no longer under active development
GitAhead is no longer under active development. Low-level maintenance and bug fix releases will be made as necessary for the forseeable future, but no new features or major changes are planned at this time.
