When comparing KTorrent vs Folx, the Slant community recommends Folx for most people. In the question“What are the best Torrent clients?” Folx is ranked 8th while KTorrent is ranked 11th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Works great even with a high number of torrents
Even if you have 500+ torrents, KTorrent works without any issues.
Pro Good UI
KTorrent has a neat and minimal UI.
Pro Remember login and password for websites
Pro Speed control
You can set up speed control in different ways.
Pro Allows torrent search
PRO version of Folx enables torrent search directly from the application.
Pro Splitting of downloads in up to 20 threads
Download can be split into up to 20 separate simultaneous downloads - threads. When the server supports multiple connections this can greatly improve download speed.
Pro Scheduling of downloads
You can choose the time for starting the download.
Cons
Con Requires KDE dependencies
This is somewhat inconvenient if you're not on KDE.
Con Customer support is terrible, do not send them money
Customer support refuses to be helpful. DRM must phone home and support blames you when their website goes down.
Con Does not quickly close after download completes
It takes 24 seconds before folx will close when a download has completed, and this window pops up and grabs focus interupting whatever it is you're doing. Very intrusive.
Con Sometimes it doesn't complete the schedule
Con Sometimes downloads start automatically
Con Difficult to uninstall browser addons
You will need to uninstall the addon and then clear the browser's cache. With Safari you will need to enable the developer menu before you can do this.
Con Useless
Can't download anything without upgrading to Pro paid version.