Mechanic shutter

pro:

• best flashlight compatibility.
• good for moving objects to avoid jelly effect

cons:

• it effect the shutter life
• make sound.

Electrical shutters

pro:

• it best protect the shutter cause it does not use mechanical shutter

cons:

• it has jelly effect
• LED light flickering.
• objective distortion

Electric first curtain shutter(EFCS)

This is the best mode for balance. How it works?

• it expose starts electrically
• it expose ends mechanically
  benefit:
• it reduce the mechanical shutter use
• it avoid the jelly effect
• Stable.

Conclusion

Use the EFCS by default. When shooting the moving object or using flashlight, switch to mechanical shutter.