I have been using atlassian sourcetree for quite a while. It has very similar look and feel :)
But I do agree there are lots of very similar UIs for various git GUIs. And I'm sure SourceTree borrowed lots of their layout from others as well.
I really like GitKraken and the team is taking feedback applying it constructively and putting out an impressive product. The part I really like is it's the same app on OSX, Linux and Windows using Electron to build it was a smart move on their part. My favorite feature has to be dropping a branch on another branch to create a pull request. I don't fanboy stuff much these days but I am a pretty big fan of their's right now.
here are some differences from the top of the head:
* Fork has tabbed interface
* For each commit you can see not only changes, but also the whole repository as it was at the moment of commit
* Diff viewer shows exact difference between two pieces of code. For example, here are both SourceTree and Fork showing the same commit: https://dl.dropboxusercontent.com/s/fn9mzjmyvhec2sa/2016-08-..., In ST (on the top) you need to figure out what has changed, in Fork (the bottom one) you see the difference clearly.
* Repository browser shows you many details about your repositories in the similar way as Finder does
* Commit list marks commits which do not belong to your commit tree with gray color
I haven't seen a single interface that gets it right. JetBrains' integration in their IDEs is the closest to "mostly usable" I've seen, where branch creation, pulls, merges, conflict resolution, and pushes are fairly straightforward. It's still far from perfect - I do the lower-level Git > Pull rather than using the Update Project window because I have no idea what operations that window performs; and some rare operations still require dropping to command-line. I'd rate their implementation a 7/10 compared to the 3/10 other tools like Sourcetree provide.
A huge reason JetBrains has an insurmountable lead is its diff and merge editor. It is the best on the market, and the only usable side-by-side merge tool I can work with. Their 3-way diff is a dream to use. The last time I had to assist a co-worker merge a conflict using WinMerge on Windows, I gave up after 30 minutes. I flat out could not understand what the differences were, let alone figure out how to resolve the conflicts. Went back to my desk, checked out the branch in JetBrains' PhpStorm, performed the same merge, and had the conflicts resolved in a couple of minutes. It's no surprise to me that people using WinMerge erase work done by other people far too often.
Anti-disclaimer: not affiliated in any way with JetBrains. Their IDEs are mostly amazing, though it's frustrating that they focus 95%+ of their efforts on new features without going back and fixing what is wrong with their existing features. Their diff/merge editor, at least, is unmatched by any other product I have seen to date (other than the fact that CMD+F / CTRL+F to find in the diff editor is broken... again, JetBrains has some serious bugs that never get fixed).
WinMerge? On Windows? I'm using beyond compare which is pretty nice when correctly configured, tortoise internal diff ain't bad either. Both have three way diff which I consider standard for any diff tool. Jetbrains indeed get a lot of things right. Using their resharper (visual studio), webstorms and itellij ultimate versions. They make amazing products.
Does it really? I just checked that I am on the latest version on osx and it's not tabbed. Is this a windows only feature or something?