I've not used those but the AD series is evidently very popular from what I've seen. I can see why they are catching on cost/performance it's hard to match. I sold the F20M to an A7 user as I wasn't really using it much, still trying to move one of the Metz flashes
I use flash quite a bit outside so I got a Godox mini softbox in for review as well, and a Zomei tripod
I stress review because I like to pick hairs and find faults
The 685S review video is here:https://www.youtube.com/watch?v=dwfk3ootBaM&t=2s
I plan on doing more photo reviews but it will take time to get traction, previously did quite a few torches etc which I am cutting back on!