I think it depends where you spend time in each language and what projects you do.
I use both regularly, and with Rust my time to productivity is faster because I'm not dealing with a build system first and with splitting code between headers and implementations.
I find rust is also better for letting me keep less of the program mentally in mind since I can localize my thinking about data a lot more.
Where rust is worse for productivity is the learning curve is high for many (though personally I found it much less so than C++ given how large the language has gotten). The other issue is most libraries I deal with are built in C++ so I have to either bridge them or drop back to C++
I use both regularly, and with Rust my time to productivity is faster because I'm not dealing with a build system first and with splitting code between headers and implementations.
I find rust is also better for letting me keep less of the program mentally in mind since I can localize my thinking about data a lot more.
Where rust is worse for productivity is the learning curve is high for many (though personally I found it much less so than C++ given how large the language has gotten). The other issue is most libraries I deal with are built in C++ so I have to either bridge them or drop back to C++