Use find to create a file that has checksums. Do it on box1 and then box2.
Code:
find /path/to/maps -type f -exec cksum {} \; | awk '{print $3, $2, "box1" }' > box1.lis
find /path/to/maps -type f -exec cksum {} \; | awk '{print $3, $2, "box2" }' > box2.lis
Next, merge the two files into one larger file with sort.
Now you can awk to find the duplicates, and the checksums tell you if the files are the same or not. box1.lis and box2.lis tell you the names of all of the files on each box.
If this did not so homework-ish, I'd show the awk code.
