# Generating
mkdir -p /tmp/dir1/a\ subdir
echo good > /tmp/dir1/foo
echo yes > /tmp/dir1/so\ long\ file\ name\ with\ spaces
echo bar > /tmp/dir1/a\ subdir/bar

mkdir  -p /tmp/dir\ 2/a\ long\ name\ for\ a\ subdir
echo good > /tmp/dir\ 2/a\ long\ name\ for\ a\ subdir/The\ Bar
echo yes > /tmp/dir\ 2/a\ long\ name\ for\ a\ subdir/The\ Foo
echo bar > /tmp/dir\ 2/cool

# Verifying if the files have the same content
find /tmp/dir1/ -type f -exec md5sum "{}" \; |cut -d\  -f1 |sort > /tmp/hashes_dir1
find /tmp/dir\ 2/ -type f -exec md5sum "{}" \; |cut -d\  -f1 |sort > /tmp/hashes_dir2
diff /tmp/hashes_dir1 /tmp/hashes_dir2
# no output

# trying the suggestion:
diff -q /tmp/dir1 /tmp/dir\ 2
# Somente em /tmp/dir 2: a long name for a subdir
# Somente em /tmp/dir1: a subdir
# Somente em /tmp/dir 2: cool
# Somente em /tmp/dir1: foo
# Somente em /tmp/dir1: so long file name with spaces

# Showing the correspondent files:
find /tmp/dir1 -type f -exec md5sum "{}" \; > /tmp/hashes_dir
find /tmp/dir\ 2 -type f -exec md5sum "{}" \; >> /tmp/hashes_dir
cat /tmp/hashes_dir |sort
# c157a79031e1c40f85931829bc5fc552  /tmp/dir1/a subdir/bar
# c157a79031e1c40f85931829bc5fc552  /tmp/dir 2/cool
# d7f986677d9f563bd1794b09d82206a3  /tmp/dir1/foo
# d7f986677d9f563bd1794b09d82206a3  /tmp/dir 2/a long name for a subdir/The Bar
# eb4585ad9fe0426781ed7c49252f8225  /tmp/dir1/so long file name with spaces
# eb4585ad9fe0426781ed7c49252f8225  /tmp/dir 2/a long name for a subdir/The Foo