When comparing FTP Synchronizer vs Krusader, the Slant community recommends Krusader for most people. In the question“What are the best GUI file managers for UNIX-like systems?” Krusader is ranked 7th while FTP Synchronizer is ranked 19th.
Ranked in these QuestionsQuestion Ranking
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 Great two-pane interface
Pro Folder synchronization
Pro Handles most archives. There is little difference in behaviour between an archive file and a regular folder.
Pro Virtual file systems
Search results as example saved into virtual folder and can be accessed later. All file operations may be performed on items in search results as if they were files in single folder.
Pro All common operations can be done with keyboard efficiently
In addition, shortcuts can be easily renamed.
Unlike Dolphin and many others.
Pro SFTP support
Pro Many operations like copying and moving files can be queued
Long running operations can be queued.
There is no point in doing them in a parallel way, as speed decreases dramatically.
Pro Can view and edit many files
Even editing a file inside a .zip file.
Has hexadecimal viewer embedded for binary files.
Pro Filename association and instant console availability
Pro Multi-rename tool
Pro Searching capabilities and copying/deleting/moving in background
Pro Custom commands can be added to the menu easily
And they can use the current folder, the selected files....
Cons
Con Overpriced
Even using single license mode no longer functions correctly. No longer sending emails as it says it does.
Con KDE dependencies
If you don't use KDE, you'll be forced to install quite a large amount of KDE libraries.
Con New releases are infrequent
It can be seen in https://quickgit.kde.org/?p=krusader.git that maintenance work is done in a continous fashion, but no new releases are provided.
Even though it is perhaps the more feature-rich file manager.