Anker is better.
The main reason is that Anker has been doing mobile power for a longer time and has accumulated more technology in mobile power. Green Link has only started to do mobile power in recent years, and the time of doing mobile power is very short, and the technology accumulation is obviously weaker than Anke.
Anker's charging head uses the same chip as Apple's original charging head, and the data cable has Apple's official mfi certification