The continuum of Awesome and Stupid grades operates on a exponential scale rather than on a straight slope. For example, for the awesome level of an object to go from Meh to Slightly Awesome, only a small increase in the ratio of awesome to stupid particles would be required. To go from Slightly Awesome to Moderately Awesome would require approximately a tenfold increase. Each subsequent grade requires a similar exponential increase until you have achieved the ultimately awesome grade.
Similarly, only a small increase in the ratio of stupid to awesome particles is required to go from Meh to Slightly stupid, but exponential increases at each grade. Thus, the Ultimately Stupid grade has an exponentially greater amount of stupid than any of the lesser grades of Stupid.