The "rs" project is too good to be true.
The official one uses MS SQL server and takes quite a bit of memory (which I call it a hidden monthly cost as I need to be using a bigger cloud instance) but this one only takes so little, you can host it on any cheap VPS and it has been working just fine against official clients for years.
bitwarden_rs on the other hand, works just fine, never had an issue with it or incompatibility with the browser extensions or mobile apps.