Excel 2002, Word 2000

I'm looking for a way to compare entries in columns D-Q to all other D-Q
entries when a value in Column B is the same.

Example: Rows 5, 12, 17, and 20 all have "ABC Company" in Column B. Colums
D-Q in each of those rows contain various invoice details.

I want to return an answer of "SAME" for any column in which all values are
the same in rows 5, 12, 17,20, and "DIFFERENT" if any entry in those rows
varies from other entries in the same columns for 5,12,17,20.

Column B data may have one or several entries for the same company. I want
to compare entries in columns D-Q for any rows that have the same "B" Column
value.

Can this be done other than manually? If so, please share a solution.
Thank you.

Allison