The ATFS-2 pedals are ideal for users who need an absolutely silent action.
The Boss FS-5U is better suited for users who need to use them in loud environments with heavy vibrations.
If you want the added flexibility of handheld control, the AirTurn DIGIT can be used as both a foot controller and a handheld remote. The DIGIT easily snaps in and out of the pedal board and can be connected to ATFS-2 pedals or operated with the silent membrane buttons on the face of the unit.
All prices are in USD.