I think they’re forked form the same source, Bittorrent Sync, so function the same under the hood. I wasn’t suggesting Resilio did something Syncthing didn’t. I’ve just found Resilio easier to use for client devices. And that OP was concerned about losing files from syncing.

The only odd behaviour I’ve had with Resilio, is when hosted on Unraid, random files on the SMB share sometimes have database names on large folders with lots of files (RSH-78254 for example), but when synced to remote devices, the filenaming is then accurate. I’ve been meaning to spin up Syncthing to see if it does the same, but as Resilio has yet to lose me any files, I’m sticking with it.

Could be a Docker issue as well I guess.