Mi box 3, which I currently use is good. Mi box 4, which was recently launched have the same processor & configuration as old one, except a patchwall which is a custom skin on top of Android TV OS
One can buy either one of these without any issues. Currently, i have the following Apps installed & working on MI box 3 (international version)
- Kodi
- Amazon prime (Nvidia shield Version, other versions will force close)
- Jio TV
- Firefox etc
- Netflix with 4k streaming
- Airplay app for streaming from Apple devices. Works pretty good
The apps which fail to work
- Amazon Music, Jio Music, and Wynk
I am using it with RII Remote as well as with MI remote. I have connected a USB hub, connected 16GB USB pen drive and using it as an internal storage.
Hope I have provided enough information