I did have the need to use DJI's product support years ago due to an issue with my original
Phantom 4 while it was still in warranty. My experience was very positive, and in the end, they sent me a brand new copter which I still have/use today. Having said that, I am also aware of many frustrating experiences others have had with DJI's support, so I considered myself fortunate.
The bit of reading that I have done on the Autel Forum in the past would indicate that Autel's after purchase support is very good. There are, of course, examples of folks not being happy with their support, but there are far more reports of Autel having very good product support.