Hi have a fender jazz bass mim fretless upgraded with dimarzio ultra j of 1998. I asked a luthier his opinion if this bass could compete with a new fender fretless mia and he told me there would be no difference in quality between both basses. And that perhaps my bass is better. Also that dimarzio and seymore duncan mics are not worst mics than the ones of the fender jazz bass mia. I tried both basses and they are quite similar but the fender mia has a more typical fender tone, both great basses.