Explanation
"Material Costs" calculates purely area-based: per model element, area × "Price in CHF" of the assigned component, summed to the "Component Costs" metric.
"Quantity Takeoff" provides a quantity framework organized by eBKP-H, where you enter your own cost rates per position (CHF/unit or lump sums) and export as CSV.
In short: Material Costs = quick cost metric from catalog prices, Quantity Takeoff = detailed, eBKP-H-structured cost framework.