- exceptions don't appear in the signature of a function
- you don't have to handle exceptions explicitly, while you cannot access the value of a Result without explicit error handling
- Exceptions are implemented like Rust's panic. The error path in exception is more costly, while the nominal path is supposedly less so, due to less register and branch pressure than the result type that at least has a discriminant to check.
Exceptions are such a different way or handling errors from Result that my team finds itself reimplementing Result types in C++ again and again. Alas, it is neither standard nor ergonomic in C++
