I personally don’t have any real experience with Go. Lots of smart folks I work with love it. In general, most of what I have read suggests that Rust is better suited to CLI tooling. For my use case it came down to:
Rust’s cargo system
The clap crate (which supports building out bash shell completion scrips via a Rust build script. Basically means I can generate a completion script at compile time and include this in the package I distribute to users)
Rust’s out of the box performance
The heavy lifting done by the borrow checker in bringing safety