Claro, siempre la versión en físico va a tener una menor compresión, por tanto más calidad.
Además, la app de Apple en dispositivos de terceros tiene menos bitrate que en un Apple TV.
You can enable the developer HUD on ATV with a computer running MacOS and Xcode to see real-time bitrate info. Non-ATV devices like FireTV stick comes with Developer Tools app which can be installed and configured to display bitrate info.
Igans316 on Blu-ray.com has tested hundreds of films and found that the Apple TV app on 3rd party devices streams ~10-17 Mbps, and the Apple TV app on Apple hardware streams at ~15-31 Mbps.