When comparing Multi Commander vs xplorer², the Slant community recommends xplorer² for most people. In the question“What are the best file managers for Windows?” xplorer² is ranked 8th while Multi Commander is ranked 14th.
Ranked in these QuestionsQuestion Ranking
Pro Separate tree for each panel
Pro File coloring based on filters
Including optional background coloring.
Limitation of this pro: text and background color cannot be taken from 2 different filters and thus combined but on the positive side: it provides coloring profiles, which can be switched (supposedly easily).
Pro Both 32 bit and 64 bit versions available
Pro Full of features
A hundred different options: multi-rename, convert line break of files (CR, LF, CRLF), double panel, folder tree, tabbed interface, colourized tabs, etc.
Pro Portable version available
Pro Heavily customizable
Besides many customizable on-board options and features, one can also write his/her own scripts and even full plug-ins.
Pro Written in C++
The program launches fast.
Pro Support for FTP, Registry, and OneDrive
Pro Powerful scripting system
You can easily write powerful scripts even without knowledge of programming.
Pro Good all-purpose file manager
Pro Browse Flat to view the contents of several subdirs as if they were stored in a single dir
Let's say you are located in a given subdir that has 5 subdirs. You can see the contents of all the files located in those subdirs as if they were stored in a single dir. Very useful when you want to locate files that you don't know exactly where they are located and searching is not an option.
Pro Supports TotalCommander plugins
Pro Connects to network drives and cloud storage easily
Pro Mass rename capability
Pro Faster than most similar applications
It's hard to find a free or low cost alternative that is as quick, and stable, especially managing NTFS volumes on a remote NAS. It still freezes and chokes, just not as often as newer applications, like XYplorer, Free Commander, etc.
Pro Scrap Area where you can drop files located in different sub directories to allow you to access them instantly
Let's say that today you are going to update a letter located in subdir X, continue developing a spreadsheet located in subdir Y, review a presentation located in subdir Z, review a project located in subdir W, etc.. You can drag and drop all these files to the Scrap Area and open and work with them, save them, open again, continue tomorrow and the files will be updated in their respective original locations. No need to navigate and navigate and navigate.
Pro Ability to save state
xplorer² gives users the ability to save the state, so the program will open with the same state the next time it's used.
Pro Execute DOS commands
Pro Comprehensive functionality
Full search, sync files & folders, show folder sizes, robust copy, native file viewer, tabs within panes, very configurable display, command shell, bookmarks, etc.
Pro Free version available
There is a free version available, xplorer² Lite, for non-commercial use.
Pro Can create "tabs" of the most used sub directories that you can access with a simple click
Pro Copy/Move many simultaneous tasks
Can display the size in bytes of every folder listed in the current branch of the tree.
Pro 250+ file attributes that can be added as columns to view more file attributes
Con Settings are a bit complicated
Con Slow Right Click Response
Con Tree cannot be displayed on the right side
Con Stagnating rate of development
Any improvements to the software are happening at a glacial pace which is making this software more and more outdated for a long time now.
Only a few minor improvements a year. User suggestions for improvements are routinely rejected or explained away. As for suggesting new features -- you'll quickly abandon all hope. Only realistic reason to visit their support forums is to read Kilmatead's posts -- for anything else prepare to be disappointed.
UPDATE (and slightly offtopic): Kilmatead seems to be no longer active on the forums, so the next best thing is xplorer2 blog which seems to often feature interesting technical topics.
The interface is essentially unchanged since its Windows XP days, with very little customization possible. Organization of features is convoluted, with some simple ones, like individual icons to quickly switch views missing. The stagnant cluttered design can make even long-time users drop the program.