That's it. I think mine is a Tsugaru. The common belief of those who are not so fond of Koetsu cartridges is that they are lacking in the frequency extremes, highs and lows. Most listener's would agree that the midrange is sublime. I would take it for what it's worth, just someone else's opinion. The Urushi does not have the best bass response I have ever heard, but it is more than adequate. The high frequencies are silky nice. Others have written that the Urushi has a broader response with better definition from top to bottom than do the other Koetsus in its near price range, which would most likely include the Rosewood and Rosewood Signature. I am not qualified to judge, since I never heard a Rosewood, etc, in my own system. I am curious about the Platinum series. I asked the Japanese dealer from whom I bought my Urushi if he would send it back for rebuild as a Platinum, but he was not interested.