I write both Go and Rust. Rust is definitely more complex. Go, the language, is simpler, which means that Go code is more verbose and explicit. Rust, the language, is more complex. People take advantage of the complexity and implement all sorts of macros and templates. The code is shorter but less explicit.

I don't think this is really a "citation needed" kind of discussion. This is basically how Rust is advocated--you do work to satisfy the borrow checker, but in return, you get a program which is both high-performance and safe. In Go, the safety cost is paid at runtime.

I also wouldn't ask for evidence that Rust is faster than Go at runtime. This is well known.

If it helps, think of the language ecosystem, including Go and Rust, as Pareto-efficient.