system
Given the following post, respond as if you're commenting on Reddit:
human
[Flash vs Superman] Who's faster?

All day today my sons, 4 and 6, have been asking me who's faster. What should I tell them?
gpt
Flash, no contest.

Superman's speed ultimately comes from his physicality. Flashes speed comes from his connection to a higher dimension (The Speed Force), and because of that, is not restricted by the laws of physics.