Excel Power Query - Match one column but not the other

In Excel Power Query I am trying to match two tables where one column should match (i.e. GUID), but the other shouldn't (i.e. Value) so that I end up with only the different values from the join/merge.

So the equivalent in SQL would be this:

SELECT A.*
FROM dbo.A
INNER JOIN dbo.B ON A.B_GUID = B.GUID
WHERE
    A.Value <> B.Value

Is this possible at all or will I need to use some kind of INDEX MATCH or VBA code to achieve this?

Attached you will find an example file with the result (green header) that I expect.

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Just do a join on GUID, add a column to return true if the values match, false otherwise then filter out the true values.