I have a white fretless Tokai Jazz Sound from the early 80s which I love to pieces. Some years back I had the chance to buy a black fretted one from more or less the same year, and I snapped it up sight unseen, thinking that it would be really cool to have the pair like that - black and white, fretted and fretless. But despite being as similar as could be on paper, the black one somehow entirely lacked the charm of the white one. I couldn't even really put my finger on why - something in the combination of neck shape, tone, weight, the feel of the finish - it just felt wrong and I didn't like it at all even though it was incredibly similar. But I sold it to someone who loved it.