WiFi
WiFi transmits data at the speed of light, constrained only by processing overhead and protocol requirements. Modern WiFi 6E standards achieve theoretical speeds of 9.6 gigabits per second, enabling the transfer of a high-definition film in approximately four seconds. The electromagnetic waves carrying this data traverse space at 299,792,458 metres per second.
This velocity enables real-time video communication, instantaneous document sharing, and the immediate delivery of outrage to social media platforms. WiFi's speed is functionally sufficient for every application humanity has devised.
Superman
Superman's velocity specifications exceed WiFi's electromagnetic propagation through sheer physical impossibility. He has been documented exceeding light speed on multiple occasions, travelling through time via acceleration alone. His reaction times operate in nanosecond ranges, permitting him to catch bullets, redirect missiles, and arrive at crisis scenes before reasonable physics would permit.
However, this speed serves only transportation and reaction purposes. He cannot transmit season four of a streaming series to your television regardless of his velocity.
VERDICT
Superman claims this criterion decisively. Exceeding light speed trumps gigabit data transmission, even if the practical applications differ substantially.