Fastest rsync between directly connected Linux boxes

For my own reference, after experimenting, the fastest transfers for copying an Epic Stores Games (lutris deployment) between hosts connected via a cat6 cable:

RSYNC_CONNECT_PROG='ssh -o "Compression no" -c aes128-ctr %H' time rsync -a --delete --progress 6.6.6.11:Games/epic-games-store .

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