Differences between Event Receivers and SharePoint Workflows

	Event Receivers		Workflows
1.	Can be Executed Synchronously or Asynchronously.	Can be Executed only Asynchronously which means when an action is completed.
2.	Since it is executing in both modes we can cancel the action which is going to be occurred.	Once an action is started you cannot stop the operation.
3.	Can't be initiated manually	Can be initiated automatically or manually.
4.	Logs are not possible	Log can be written in workflows
5.	Can be used in actions that needs to be completed immediately based on logic (Immediate execution)	Can be used in actions that will take even months or years to complete.( Long running)
6.	no state is maintained	Workflow maintains state.
7.	Triggered on Synchronous or Asynchronous events.	Triggered only on Creation/Change/deletion events.