Speed
Spider-Man Wins
Sloth
The sloth's maximum terrestrial velocity of 0.24 kilometres per hour represents not a failure of evolution but rather its most sublime achievement. This deliberate pace allows for the cultivation of symbiotic algae in its fur, providing camouflage and additional nutrients through dermal absorption. The metabolic rate of a sloth operates at approximately 40-45% of what would be expected for a mammal of its size, a biological efficiency that would make any engineer weep with admiration. One must consider that the sloth's ancestors once included the Megatherium, a ground sloth the size of an elephant, suggesting that slowness is a refined evolutionary choice rather than a limitation.
Spider-Man
VERDICT
Spider-Man's velocity exceeds the sloth's by a factor of approximately 66,000, representing an insurmountable quantitative advantage.