How does this differ from RocksDB / MyRocks?

MyRocks have been archived for MySQL. MyRocks in MariaDB is using a very old version of RocksDB in which is rather buggy. TideSQL is similar to MyRocks but it goes a lot further with it's features, trying to offer parity with InnoDB. TideSQL's core is using TidesDB the library which is a write, and space optimized storage engine written in C from first principles, so from the ground up.