When comparing GitEye vs GitUp, the Slant community recommends GitUp for most people. In the question“What are the best Git clients for macOS?” GitUp is ranked 8th while GitEye is ranked 16th.
Ranked in these QuestionsQuestion Ranking
Pro Native GitHub GUI support via GitHub Eclipse plugin
GitEye can be integrated with the GitHub Eclipse plugin to have support for GitHub.
Pro Custom commands can be defined that allow launching third-party tools
If you are using a lot of third-part tools besides GitEye, you can set up shortcuts to launch them easily from inside GitEye, greatly improving your workflow.
Pro Has a graphical compare and merge tool
Pro Great for those starting out with git
Pro Open Source, GPL-licensed
Pro Allows doing complex things without memorizing git
Git usage beyond basic checkout/commit is arcane; GitUp lets you do things in git in seconds that would take you a half hour of research with the command line.
Pro Full undo
You can backup, or edit commits, if you make a mistake.
Pro Blazing fast
Fast Git GUI. Everything is already there and loaded when you open up the window.
Con Poor documentation
The documentation isn't very detailed and does not do a good job at explaining everything.
Con OS X Only
Only available for OSX, so if you are used to working with different OSes and you want the same tools in each of them, it's impossible to have that with GitUp.
Con Font size is not adjustable
Tiny font not good for those with poor vision.