If you really want to find out what different solders sound like, make a run with it as speaker wire, thats about the only way to A:B test it.
Part of the question should also be the best way to solder. If you just place a wire in a loop or tag strip and solder it then the solder is a bridge between the 2 parts, and very much in the path. The better way is to put the wire through the loop then wrap it tightly, so much so that the solder almost becomes redundant to the connection.