The difference between them is that they have different functions, different sounds and different structures.

1, with different functions: s5fe has a usb smart port to provide continuous power supply service to upgrade the electronic control program, while s5ft does not.

2. The sound is different: the sound of s5fe is obviously reduced, and the sound of s5ft is louder.

3. Different structures: s5fe adopts cam structure to control the needle distance, and s5ft adopts stepping motor to adjust the needle distance.