I mostly fly waypoint missions so Litchi is my goto app, but if I want to do general flying, I will use Go. I haven't been flying very much lately because they just built a hospital with a helicopter pad close to me, so I haven't experienced all of the problems with Go like I see so many complaining about. If Go gave me those problems, I'd probably fly Litchi exclusively since I've had good luck with it and more problems with Go.
To say it this way, if both had similar performance, I'd still fly Litchi just for waypoint missions and use go for general flying since I am more comfortable with it after flying with it for longer than Litchi.