check two folders file match

import os
cr2Directory = "//tank4/production/2018/geomni/ga/USGAATL/raw_data/GV1704A_N4950U_D20181211_A"
jpegDirectory = "//tank4/production/2018/geomni/ga/USGAATL/project_data/imagery/GV1704A_N4950U_D20181211_A"

cr2List =[]
jpegList=[]

for root, dirs, files in os.walk(cr2Directory):  
    for filename in files:
        if filename.endswith(".CR2"):
            newfilename = os.path.splitext(filename)[0]
            cr2List.append(newfilename)

for root, dirs, files in os.walk(jpegDirectory):  
    for filename in files:
        if filename.endswith(".jpg"):
            newfilename = os.path.splitext(filename)[0]
            jpegList.append(newfilename)

listDifference = list(set(cr2List) - set(jpegList))

for name in listDifference:
    print(name)