SQL Server using Except vs Binary_Checksum

Question

I am using SQL Server and want to do Bulk Updates but don't want any row to be re-updated if same values already exists.

For Example Consider following tables with their data

DECLARE @UpdatedIds TABLE
(
    BookId  INT
)

CREATE TABLE Book
(
    [Id]        INT,
    [Name]      NVARCHAR(MAX)
)

INSERT INTO Book([Id], [Name])
SELECT 1, 'Book1'
UNION
SELECT 2, 'Book2'
UNION
SELECT 3, 'Book3'
UNION
SELECT 4, 'Book4'
UNION
SELECT 5, 'Book5'

CREATE TABLE #Book
(
    [Id]        INT,
    [Name]      NVARCHAR(MAX)
)

INSERT INTO #Book([Id], [Name])
SELECT 1, 'Book1_Changed'
UNION
SELECT 2, 'Book2_Changed'
UNION
SELECT 3, 'Book3'
UNION
SELECT 4, 'Book4'
UNION
SELECT 5, 'Book5'

What I want is when I run the following query

UPDATE [BO]
SET [Name] = [BU].[Name]
OUTPUT [INSERTED].[Id] INTO @UpdatedIds([BookId])
FROM [Book] [BO]
INNER JOIN #Book [BU] ON [BO].[Id] = [BU].[Id]

SELECT * FROM @UpdatedIds

@UpdatedIds should have records of 1 and 2 not 3, 4, or 5

I have 2 ways of doing this in my mind and would like to have opinions about which one will be fastest/better.

1. Using Except Keyword and delete rows that already exists

2. Using Binary_Checksum that is comparing Checksums of records in actual table and in temp table and removing records with equal checksum

Thanks