Question of the Day: Who is the Fastest Runner: Flash or Superman?

I know this topic has been debated and discussed plenty of times but I figure why not toss in my 2 cent. So who do I think is the fastest runner: Flash or Superman?

I think the Flash is, especially since super speed is his main power otherwise why would he be called the fastest man alive if he wasn't. I know Superman also has super speed but he also has a lot of other powers and to me it makes more sense that the Flash would be the faster of the two in regards to running.

Now if it was Superman flying vs the Flash running like in the Justice League movie end credit scene then I think that would have a different answer because in that situation I would say that Superman would be the fastest. But since this question is about the fastest runner, I still say the Flash is.

You know my answer, so who do you think is the fastest runner: Flash or Superman?

(Justice League movie)