Flat rubber band 20 12 or 20 14, which configuration is more powerful?

Is the flat leather bow more powerful or the traditional bow more powerful? Flat rubber band has small tension and high speed. Compared with traditional bows and arrows, they are more stable and depend on personal skills. As far as tension is concerned, the traditional circular rubber band is definitely heavier, and each rubber band has its own method to improve its initial speed. Round leather can be worn inside, and flat leather can be tapered. Generally speaking, each has its own advantages and disadvantages.