Diffeerences files

Hi,
I have two files and and when comparing getting lot of differences ,I would like to know sample 5 comparison records with column names

dff -iw file1 file2 --It will gives the not matching records but If not matching records are very huge ,i need sample 5 records which not matching with column names.Please anyhelp.

Ex:
file 1
col1 col2 col3 col4
xx xx1 xxx2 xxx4
-- ---- ---- ---
--- ---- --- ---

File 2

col11 col22 col33 col44
yy yyy yy2 yy3

--- --- --- ---
--- -- --- ---
Thanks,
Mohan