Ok,
I have two files (4mb each).
These are data files and contain data as follows:

A header
10 - 12 Lines of data under the header

This is repated through the file,
I need to create a process to check the data (1 header and its data below) from one file with the same data from another.
If the data is different (e.g Has a new line below header)

Trouble is the data (Headers) are in different places throughout the file compared to the other file.

Sorry if not explained well
Any help appreciated greatly