Amazon River vs. Mississippi River Flow Speed

The premise is incorrect: the Amazon River does not flow faster than the Mississippi. In fact, the Mississippi's average surface velocity (~0.6–1.2 m/s) is roughly twice that of the Amazon (~0.3–0.5 m/s). The Amazon's immense discharge (209,000 m³/s vs. 16,800 m³/s) comes from its enormous cross-sectional area and drainage basin, not speed. The Mississippi's steeper gradient and narrower channel produce higher velocities.