Lake_Flyer makes a very point that I over looked.
I have used Litchi almost since Day 1. I rarely use DJI Go4. Some of my flights there are homes and hills that block the signal, you can set up Litchi with a mission, signal lost, the mission completes itself, there are settings for lost signal to RTH or Land in place (when flying without a mission). The first time I flew a mission and lost signal, I got nervous then, it re-established connection, video feed was back, and the mission continued. I have never had any issues with Litchi, with DJI Go4, get frozen video feeds, all sorts of problems, so go with Litchi, it's not that expensive.
Ummm, for what ??For what?
Both let you fly the drone
But litchi does way more stuff that just flying it
So the way you asked your question doesn’t make it clear what your after. If you want a meaningful response from people you should consider asking differently.