Editor-rs/vscode-rust or rust-lang-nursery/rls-vscode

Allright, it it maybe a silly question.
I recently tried to learn rust. And i found two extensions, and both seems up to date.
I just wanted to know why is rust-lang-nursery/rls-vscode build. Is there any feature that editor-rs/vscode-rust doesn't offer?

Here link to link to discussion about these two plugins: Try out Rust IDE support in Visual Studio Code - #3 by Dushistov