I have had success with Ulti X-compound tires and the occasional Z-compound use but I have to ask how the Y and J compounds compare, beyond the slightly useless explanation you get from Ulti themselves.

Y compound says: "This matches carpet and low grip and works well with tire treatment. This compound will create a little more push compared to the X compound." Does this mean it is like a synthetic rubber along the lines of Black/Grey/Yellow or does it mean something else?

J compound says: "This matches asphalt to all carpet and in the condition of an especially high grip." So is this a tire along the Pink/Double Pink/Purple line?

Just asking before I order tires for the IIC.

Thanks