When comparing RetroArch vs FLauncher (Android TV), the Slant community recommends RetroArch for most people. In the question“What are the best Android TV/Google TV/Fire TV enhancements?” RetroArch is ranked 11th while FLauncher (Android TV) is ranked 19th. The most important reason people chose RetroArch is:
Almost full support for any gamepad and joystick you wish to add.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Gamepad and Joystick
Almost full support for any gamepad and joystick you wish to add.
Pro Multi-console
Can emulate GameBoy, GameBoy Advance and GameBoy Color.
Pro You can change the background
You can use gradients, own picture or a picture from unsplash.
Pro No ads
It has no ads, shop or a discover tab.
Pro Non-TV apps
You can add non-TV apps.
Cons
Con Only available in English
Sadly, only available in English.
Con A bit complicated to replace
You have to disable the Leanback/AndoidTV Launcher over ADB to replace it or remap the home key.
Con No shortcuts for input source
No shortcuts to change input source (HDMI 1/2/3, AV etc) which makes it hard to use for SmartTVs.
Con No channels support
You can not use app channels.
Con Feels too simple
Apart from backgrounds and small modifications you can't much do.