Weekly Puzzle and New Logo/Shirt Design

Based on the following facts, which object's surface is rougher and why?

Diameter of the Earth is 7926 miles at its equator. The highest point on Earth (Mt. Everest) is 5.5 miles above sea level; the lowest point (Mariana Trench in the Pacific Ocean) is 6.8 miles below sea level.

Diameter of a basketball is ~25 centimeters (cm). The bumps on a basketball’s surface are ~1 millimeter (mm) high.

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