What is the main difference for speed governor ESD5500E and ESD5111?

What is the main difference for Speed governor ESD5500E and ESD5111?

The generator speed control governor ESD5500E is based on the ESD5111. The ESD5500E add new function of start-up fuel control and smooth slow start process control.

These new features can solve the problem of black smoke phenomenon, which caused by the rapid refueling of the engine during the start-up process, greatly improving the life of the engine.