If you have a 4k firestick, there’s no need to upgrade to this. Although it says more memory, better hardware, etc etc, you won’t really notice a difference between this and the regular 4k firestick. If you are wanting to upgrade from any other version of the firestick you will notice it is a lot faster, smoother, and the apps don’t take so long to load.
I have a Fire Cube, a few 4k firesticks, and a whole bunch of older models so if you are buying this thinking it will be faster than the regular 4k firestick, you will be disappointed.
Edit: Can I just say the comment about the firestick changing someone’s TV colors was hilarious and someone doesn’t know how to work their HDR settings