I've never handled a set of ATV tires. I think the "comp cut" are shaved between the paddles? The sand car tires are like 40lbs a piece. No one cares about weight in those.
Usually the sand car paddles come like you see in the pictures, like 450 paddles on a tire. They either cut every other one, or cut two, leave one, cut two, leave one, etc.
No one "buffs" tires for a sand car, therefore I have no idea how labor intensive it is. I don't even know if STU does that in house or not.