RedHat and HDFS report different values for "du"

[#1]

I copied a large folder structure from HDFS to RedHat using copyToLocal.  While it looked successful, i want to validate it was copied correctly by checking the size of the data in HDFS and in RedHat.  I'm using "du" but my numbers are still off. 

I run the following on RH: "du -s -b <PATH>"

I run the following on HDFS: "hadoop fs -du -s <PATH>"

I noticed that RH reports 101 bytes for empty folders while HDFS (CDH5.5.2) reports 0 bytes for empty folders.  So my question is, how to I validate the entire directory of data was fully transferred?

Thanks,

[#2 · Accepted solution]

As an alternative solution, I am comparing the two file structures for the same number of folders and files.