Default Downgrade kitkat to kitkat

Hi there.

I'm a bit of a noob and need some help.
I updated my Note 8 to the NF1 version from United Arab Emirates, it seems that my battery is draining faster and the device is not as fluid as it was. Can i fowngrade to the previous version of kitkat, which was the April version from poland, by flashing it with Odin?

Will this work or will it fail and/or trip knox? Knox counter is currently 0 and the device is stock and not rooted.