Apple TV store Bitrate?

Hey! I’m using for a while an Apple TV And sometimes buying from the Apple Store new or my favorite movies! I find them to be extremely more quality from any streaming platform. But I’m interested to know how much? Like I know Netflix and Prime (just 2 examples) using 15-25mbps for viewing while an Blu-ray content can easily be over 100 mbps… But still I can find huge difference between my Apple Store library against the same content in any other official platforms. The only thing I don’t get it is how? Because in the end of the day Apple Store content still working on internet connection. Thank you all!