Difference between EventLog.WriteEntry and EventLog.WriteEvent methods

I tried using WriteEntry and WriteEvent methods of EventLog class.

EventLog.WriteEntry("Saravanan", "Application logs an entry", 
                     EventLogEntryType.Information, 2, 3);
EventLog.WriteEvent("Saravanan",  new EventInstance(2, 3), 
                                 "Application logs an event");

Both output the same result.

Is there any difference in usage of these methods?

If there are only minor difference, why was it not done through a overload of either WriteEvent() or WriteEntry() methods, instead of introducing a new method?