Unable To Understand The Script ???

Hi,
i have a stored procedure as :
----------------------------------------------------------
CREATE PROCEDURE Insert_tblAccount
@Name varchar(50),
@Password varchar(20),
@StatusID int,
@AccountType int,
@DOI datetime,
@ROI varchar(500)
AS

Declare @NewID Numeric(18)

BEGIN

SET NOCOUNT ON

INSERT INTO [tblAccount](Name, [Password], StatusID,AccountType, DOI, ROI )
VALUES(@Name, @Password, @StatusID, @AccountType, @DOI, @ROI)

Set @NewID = SCOPE_IDENTITY()
Select @NewID As NewID
END
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i could not understand the line
Select @NewID As NewID
bcoz i have learned that NewId() function returns unique identifier
but above code returns same value as SCOPE_IDENTITY.

So can anybody make me clear what's going on ?????

thanx in advance

San