Brad from Fire in a Bottle seems to consider “starch” to be a better carb than, say, sugar, as he thinks starch can be used by many entities in the body, whereas something like sugar is 50% fructose, and has to be addressed by the liver.
Can’t say I agree or disagree, though I do have some quite high blood sugar excursions on my CGM data from “starch” such as Einkorn wheat bread and mashed potatoes (both with lots of butter). In THEORY, it seems that starch should be better than sugar or (high sugar) fruits, and it could explain why some peoples can eat tubers and the like with relative impunity.