Hi everyone, here's the difference between the old label System One and the X3 Cutting Polish: The X3 is formulated the same as the original System One product, except that it is "on steroids" by comparison. This means that the X3 has a much faster cut, and less product is required to achieve the same results. That's why there was a label change to the one we see now.
The original System One might take a little longer , but it is still worth using what you have.