Based on no evidence whatsoever, I always thought the Green Can was filled with the rinds run though a ball mill.

Not only is the taste and texture different, it doesn't even melt the same way.

Meanwhile, I've run Regianno through everything from box graters and microplanes to food processors, and can't get it to resemble the powdery stuff (or, as Mama so aptly put it, sawdust).

I agree....I don't even think it smells the same either....the green can stuff kind of smells like......well....really stinky feet...and not in the good way that some GOOD smelly cheeses do.