The Go apps are identical to the Android versions and have all he same features, the device specifics are things like
It also had the DJI Pilot App installed to again identical to the current release for the M200
Duel SD card slots= this is for playback from the craft and you can move image data around but you can’t record video cache directly onto them
HDMI Output = Mirror screen or have dedicated output.
USB A port for moving files around from USB memory sticks.
Bunch of screen settings like brightness and image look.
The ability to wirelessly share data from CS to another DJI Go device with Ad HOC Wi-fi.
Then you have just the usual basic Android settings, DJi use a skin over the OS so you have their custom landing page, while it will now work with some 3rd party apps it does not have the Google Play Store currently.