Apigee javacallout - ABORTING

[phanim]

Q) Is there a difference between using:

ExecutionResult result = new ExecutionResult(false, Action.ABORT); 
result.setErrorResponse("An error occurred"); 
return result; 

and

messageContext.getErrorMessage().setContent("An error occurred"); 
return ExecutionResult.ABORT; 

Which is why preferable?