Electrically speaking, only a "perfect" crimp will provide a better connection than a good solder job. A "perfect" crimp can really only be achieved with a hydraulic press, any other crimp connection, made with a hand crimping tool, will have voids and not be gas free, allowing for corrosion over time of copper wires, and also additional noise.
For sonic performance, soldering is going to be better, or crimp, then solder to make the joint gas free.