Downgradeable? - Note 4 (SM-N910P)

I am about to buy a New Sprint Samsung Galaxy Note 4 (SM-N910P), and just need to make sure that it would be possible to downgrade the Note 4 from whatever Android version is installed on it to Android 4.4.4 (KitKat).
I checked SamMobile and currently the known Android versions on the Note 4 (SM-N910P) are listed below along with their respective baseband numbers.
My question is this: can all of the basebands (Android versions) listed below for the SM-N910P be downgraded to Android 4.4.4 (baseband: N910PVPU1ANK2 or N910PVPU1ANIE)?

Baseband number/Android version List:
Date Baseband Android Version
2016-04-28 N910PVPS4DPD1 (6.0.1)
2016-04-27 N910PVPU4DPC1 (6.0.1)
2015-12-15 N910PVPU4COJ6 (5.1.1)
2015-11-16 N910PVPU4COG5 (5.1.1)
2015-08-04 N910PVPU3BOF5 (5.0.1)
2015-03-16 N910PVPU1BOB7 (5.0.1)
2014-12-12 N910PVPU1ANK2 (4.4.4)
2014-10-20 N910PVPU1ANIE (4.4.4)

I definitely need to know this before I buy since I'll be making the purchase online, and won't be able to know which Android version/Baseband version is being shipped in the new package.
Would anyone please help with this question?

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