There is no specific grit level to Rough Buff. It is a rubbing compound, which means it is meant to smooth out sanding lines, which, in turn, implies that it has some sort of abrasive within the cream/liquid. Like all rubbing compounds, on cars and on bowling balls, the more you apply, the harder you press the finer the finish will be. In general, the level of abrasive within ROugh Buff will take a 220 grit sanded surface (as Brunswick suggests with the Absolute Inferno and the Vapor Zone) to about 1000 grit and like all rubbing compounds it puts a verylight polishon it.
If you tested this process, you can easily see, that you can apply a small amount of Rough Buff for a short period of time with light pressure, and the result will be a rougher surface than the stock Absolute Inferno, with a less glossy finish or even less of a shine.
You can always apply some High Gloss polish over any level of Rough Buff to get more length.
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"None are so blind as those who will not see."
(That includes me too, at times! 
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