When comparing FTP Synchronizer vs Pantheon Files, the Slant community recommends Pantheon Files for most people. In the question“What are the best GUI file managers for UNIX-like systems?” Pantheon Files is ranked 18th while FTP Synchronizer is ranked 19th. The most important reason people chose Pantheon Files is:
Pantheon files (like the Pantheon IDE) is very stylish and minimal. It's minimal and very easy to use. The most useful commands are there in plain sight, on the toolbar or the sidebar.
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Pros
Pro Can sync multiple files across multiple websites in parallel
With FTP Synchronizer you can synchronize multiple files and multiple sites simultaneously.
Pro Can schedule syncs
You can schedule when you want to synchronize a particular document for a particular website.
Pro Very secure
Supports syncing over FTPS and SFTP.
Pro Does not waste time by copying every file over
When syncing a folder, FTP Synchronizer intelligently finds out which files have been changed and copies only them.
Pro Easy to use
Pantheon files (like the Pantheon IDE) is very stylish and minimal. It's minimal and very easy to use. The most useful commands are there in plain sight, on the toolbar or the sidebar.
Pro supports natural sorting of file names
Dolphin and Deepin File Manager support it, too.
Cons
Con Overpriced
Even using single license mode no longer functions correctly. No longer sending emails as it says it does.
Con Buggy
Was missing basic network connect features when Loki launched.
Con Not very advanced
Pantheon files (like Elementary OS itself) does not offer many advanced features since it's mostly aimed at beginners.
Con Unstable software, not a file-manager
really, really dangerous stuff.
Crashes and take your work/files into the nowhere - aware.
Con Not intunitive
In some instances it is impossible to create a new folder. There just isn't right-click option or icon for it anywhere.