I think cheat.sh has the upper hand over tldr, it retrieves the DBs from tldr and others, gives far better results imo.
rsync is a decent exampøe where cheat.sh does better than tldr imo: https://cheat.sh/rsync
as for cheat.sh vs manpages:
each has their uses. As someone who uses rsync once every .. two months, maybe, cheat.sh gives me the info i need much quicker.
ie: -avz, but maybe -c if you want to verify file integrity, that's 8 lines/2 examples in, but reading the manpage of rsync then checksumming is almost something you need to know to look for, which is fine for what the manpages are intended for.
these cheatsheets gives you common use cases, and are more of a quick reference.
also cheat.sh gives a lot more functionality than man, I can recommended skimming over the github page https://github.com/chubin/cheat.sh