When comparing Deepin File Manager vs SpaceFM, the Slant community recommends SpaceFM for most people. In the question“What are the best file managers for UNIX-like systems?” SpaceFM is ranked 11th while Deepin File Manager is ranked 14th. The most important reason people chose SpaceFM is:
Just right click on any menu or menu option (including the context menu itself) and you'll be allowed to customize it. This lets you add support or integration for features you find missing.
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Pros
Pro Send files and folders to external drives just from the right click menu
Pro Supports natural sorting of file names
The only other file manager that supports this is Dolphin.
Pro Beautiful UI
Pro Written in Qt
Pro Responsive
Pro Has dark theme support
Pro Incredibly customizable
Just right click on any menu or menu option (including the context menu itself) and you'll be allowed to customize it. This lets you add support or integration for features you find missing.
Pro Minimal dependencies
It only needss gtk, udev, desktop-file-util and shared-mime-info which is available in most systems.
Pro Highly extensible
Functionalities can be extended by user scripts as plugins. Some scripts can also be downloaded from https://github.com/IgnorantGuru/spacefm-plugins/wiki. Plugins can be exported too.
Pro Tab and panel support
SpaceFM supports up to 4 individually customizable panels as well as multi-tabbed file management.
Pro No back seat driver
Does not obstruct professional work by engrossing root warnings.
Pro Desktop management support
Can be used to set wallpaper and desktop icons with high configuration support.
Pro Easily open folder as root
Can open different folders as root, this way you don't have to use the terminal to move around files for which you need root permission.
Pro Gtk-2 and 3 support
Available in gtk2 and gtk3.
Pro Intuitive and extendable through plug-ins
Great UI, easy to use and configure, several plug-ins available to make everyday tasks even easier.
Cons
Con Distro-specific
Kind of in between nautilus and pcmanfm.
Con Extensions not supported
Currently it does not support script extensions. It would be more useful having plugin to integrate with Dropbox and git.
Con Lack of compact view mode
No compact view with small icons, labels to the right, and multiple dynamically sized columns. This is a standard UI idiom. What is their rationale to not support it?
Con Ugly
Con Some operations are slow
Because it tries to be as lightweight as possible and tries to use very little RAM. This can unfortunately lead to it being slow sometimes.