You know you've always wondered about it and some point in time.
"Who's really the fastest; Barry Allen or Wally West?"
For most of his career, Barry was easily always the fastest. Wally really didn't come into his own until he broke a huge mental block, and admitted that he was scared he was faster than his former mentor and partner.
Eventually we saw over time just how right Wally was, as he became the first person to enter and successfully escape from the Speed Force.
After that life-altering revelation, he gained the powers to out right borrow or steal speed from other objects or speedsters, while also embuing certain objects with a portion of his own speed.
Even Barry never did that.
And so we were content to know that as good and as fast as Barry was, Wally was faster.
Hell back in the late 90's during Grant Morrison's run on the JLA, He and Wizard Magazine choose Wally over Barry as the better, faster Flash. Especially, as was pointed out, since Wally grew up with a working knowledge of his powers and the Speed Force, while Barry was just a scientist cop who learned while on the job. Maybe a bit of flimsy reasoning, but not too crazy to consider.
Then Final Crisis came, and Barry(the Silver Age martyr of the DCU from the first CRISIS) came back to us, creating a new problem for DC.
The problem(although I don't see it that way) was there was too many speedsters/Flashes running around.
Wally was then but on the back-burner, while Barry was allowed to re-take his place as THE Flash.
Not how I would've handled it, but that's what happened, and where we are now after the reboot.
......Who Wins and why?
Think about it, he'd be all but retired, secure in the knowledge that his protege Wally had successfully taken over the mantle of the Flash. He could go back to being a foresnic cop, and really make a difference in that area, occasionally coming out of retirement for an odd battle or two.
Barry would finally be allowed to enjoy his life with Iris, be in in the future or the present.
Wally would then really be in a postion to likewise train his eventual successor, Bart. But it'd be a natural progression instead of just aging him to fit the role.
But alas, that will never happen, unless it's on in an alternate universe.