> Rust and Swift have about the same amount of syntax

I wouldn't agree, I feel Swift has significantly more surface area than Rust.

But even syntax and standard libraries aside, I think that Rust is significantly more "explicit", "consistent" and "predictable" than Swift. I consider those to be very important qualities in a PL. Maybe that's why Rust was easier to learn and memorize than Swift (with the exception of the Rust borrow checker and lifetime annotations that indeed have to be well understood to be even usable).

But it might be just me.