Min Idle Speed

Hello everyone, while reviewing the 916 engine's operating instructions, I noticed the following: The engine's minimum idle speed is listed as 1800 rpm. However, the minimum idle speed of the 912 engine I used before was stated as 1400 rpm. Is this because it is a turbocharged engine or does it produce high vibration at low rpm? Will I have any engine problems if I use the engine idle at lower speeds? Because I am having trouble during landing.