I’m mainly comparing to the progeny of C, where the biggest difference is the fact that almost everything is an expression in Rust.

No need for ternary operators. C# unsafe blocks can only appear as statements (so you cannot delegate from a safe to an unsafe constructor, e.g.). C++ cannot return from the middle of an expression.

A related aspect is the type system, which composes with expressions in really interesting ways, so things like constant array sizes can be inferred.