[Galaxy Note 4 General] fritolays:
Firmware Details

I suspect this is the case... or they just set the CSC when they ship to koodo, wind, or whoever.

100% correct.

The stock firmwares are all exactly the same; here are rogers, bell, telus, and wind:

# MD5 checksums generated by MD5summer (http://www.md5summer.org)
# Generated October 31 8:36:52 am

621d141192fd8e35cd513db59a9bf2f1 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5
621d141192fd8e35cd513db59a9bf2f1 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5
621d141192fd8e35cd513db59a9bf2f1 *fritolays/RWC-N910W8VLU1ANJ3-20141022130806/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5
621d141192fd8e35cd513db59a9bf2f1 *fritolays/TLS-N910W8VLU1ANJ3-20141022121215/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5

Now comparing the extracted tar.md5's of wind & bell:

# MD5 checksums generated by MD5summer (http://www.md5summer.org)
# Generated October 31 8:54:37 am

fb746b9637aaa3fbde259969c558e886 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/aboot.mbn
d81910c121e9b67800857027e6bca08a *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/boot.img
c7bc347a05a155be8ae39ee921c320cd *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/cache.img.ext4
abad70375b91bd3424de24cb7dde7a00 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/modem.bin
621d141192fd8e35cd513db59a9bf2f1 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5
1be0e48f4bba4076897aaaf79032d799 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/NON-HLOS.bin
c1a8e59a06c5ffc65b74dd2c93545ccb *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/recovery.img
85ca7059fd29f81218fb21fee1c9c64b *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/rpm.mbn
3be10861ec9e3a06a4d5ba2257362df7 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/sbl1.mbn
b7ef33172f8f7f20b6eec93fd423a596 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/sdi.mbn
cf20b5b3b891b7223008ed315a996b56 *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/system.img.ext4
e156797b751989e24dfa3d267832341d *fritolays/BMC-N910W8VLU1ANJ3-20141023103146/tz.mbn

fb746b9637aaa3fbde259969c558e886 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/aboot.mbn
d81910c121e9b67800857027e6bca08a *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/boot.img
c7bc347a05a155be8ae39ee921c320cd *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/cache.img.ext4
abad70375b91bd3424de24cb7dde7a00 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/modem.bin
621d141192fd8e35cd513db59a9bf2f1 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/N910W8VLU1ANJ3_N910W8OYA1ANJ3_N910W8VLU1ANJ3_HOME.tar.md5
1be0e48f4bba4076897aaaf79032d799 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/NON-HLOS.bin
c1a8e59a06c5ffc65b74dd2c93545ccb *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/recovery.img
85ca7059fd29f81218fb21fee1c9c64b *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/rpm.mbn
3be10861ec9e3a06a4d5ba2257362df7 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/sbl1.mbn
b7ef33172f8f7f20b6eec93fd423a596 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/sdi.mbn
cf20b5b3b891b7223008ed315a996b56 *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/system.img.ext4
e156797b751989e24dfa3d267832341d *fritolays/GLW-N910W8VLU1ANJ3-20141022130544/tz.mbn