I have one on my Superscoutmaster rim drive. If you're comparing the black Superplater to the aluminum one, the black one has a more robust, authority in the bass. The mids and highs are very similar to the aluminum one, but the extra OMPH in the low end gives it a slightly heavier sound...the aluminum being a bit light. The bass is NOT boomy by any means...I think that it's what music really sounds like. There is great pitch and definition in both platters, but like I said there is more low ease with the Superplatter. The aluminum is easier to make so its cost is a bit less. There are those that have said that the aluminum being easier to get perfectly round has better pitch control, however, my platter seems to be true - at least to MY ears....and I am a professional violinist.