When comparing XtraFinder vs Spectacle, the Slant community recommends XtraFinder for most people. In the question“What are the best power user tools for macOS?” XtraFinder is ranked 27th while Spectacle is ranked 36th.
Ranked in these QuestionsQuestion Ranking
Pro Old full-size color labels from OS X < 10.9
Pro Adds useful toolbar items
XtraFinder provides useful options for toolbar such as: Launch as Root, New Terminal Here, New File..., and Select...
Pro Additional right-click options
Xtra Finder provides additional options when performing the right click.
Pro Custom hotkeys
Pro Copy Path
Pro Can open a terminal in set position
XtraFinder can open up a terminal from the right-click menu in given path with "New Terminal Here".
Pro Dual panel
Split the Finder window into to windows to achieve better file handling.
Pro Colored icons in the Finder sidebar
Pro Free and open source
Spectacle is licensed under MIT with source code available on GitHub.
Pro Simple hotkeys
Spectacle offers easy-to-remember preset hotkeys.
All windows in Spectacle can be controlled with keyboard shortcuts, so no mouse is needed. This makes for a fast way to control windows.
Pro Low footprint
Spectacle only uses up 18-19 MB of RAM, which means there is not much overhead by using this app.
Pro Great UX
Spectacle is easy to use and configure. It's plug and play.
Pro Multi-monitor support
Con Doesn't work on recent macOS versions without a workaround
This tool doesn't work on recent macOS versions, except if you try workaraound that may or may not work. It involves disabling System Integrity Protection and details on how to do it can be found on the XtraFinder website.
Con Breaks on macOS High Sierra / Chrome or Firefox
Doesn't support side by side windows.
Con Impossible to add new functions
While keyboard shortcuts can be changed for the available actions, there is no way to add custom actions which in turn limits the functionality of the app.
Con Limited window sizing capabilities
You can use 1/2 of the screen vertically and horizontally (divide into 4 parts). You can also use the screen in thirds too, but only the left and right third: you can't use the 1/3 in the center. There is no way to do a more granular distribution.
Con Not maintained
The software is free, but no longer seems to be maintained.
Con Doesn't work with any Adobe products
There are some apps like Adobe Reader that do not work with Spectacle. Basically, any app with a heavily customized UI that breaks OS X accessibility will not work correctly under Spectacle.