Xiaomi’s Mi TV Stick supports full HD resolution videos at 60fps. It also comes with Dolby and DTS surround sound support. The Amazon Fire TV Stick also supports Dolby Audio and 5.1 surround sound. Like the Mi TV Stick, this one too has support for full HD content up to 60fps.
In terms of content both streaming dongles offer a variety of options and popular ones like Prime Video, Disney+ Hotstar, Netflix, Zee5, Voot and more. The Mi TV Stick since it runs on Android has access to the Google Play Store for apps.