Have added a diff utility to compare two CSV files. This one is limited by memory since it keeps both inputs in memory in order to compare them. See here for more.
This brings the list of command line utilities to:
catcsv
comparecsv
dedupcsv
diffcsv
editcsv
obfuscatecsv
pivotcsv
recursedata
reordercsv
searchcsv
sortcsv
splitcsv