I think strings would be the cheapest and easiest way to get different sounds.
My two p-basses both have fender flats, and while they do sound a bit different, I don't think anyone except the guy playing them would notice any difference, and certainly not in a mix.
My two p-basses both have fender flats, and while they do sound a bit different, I don't think anyone except the guy playing them would notice any difference, and certainly not in a mix.