They are both 'unleaded' only the 'octane' rating is different. So to answer your question Yes.
The Yamaha EF 600 generator has a four stroke engine and uses gasoline with no oil added to the fuel. It will run for about six hours on one fill of the gas tank, about 0.5 gallon (US).
The coil to the spark plug is called an ignition coil on a Yamaha EF600. It is also referred to as the spark coil. These two terms are used for any coil to the spark plug in a vehicle.