Y'know, I usually make fun of the dreaded "Versus" topic as simple childish pap, but this is definitely on another level altogether than the run-o'-the-mill "Hero-1 VS Hero-2"-kinda topics. Well done, Walrus.
As far as how it would go in a comic? Daredevil would win, of course -- he's won almost every battle against his own enemies, and the Scarecrow has lost almost every battle against the Batman Family.
The real question is how would that battle go? And how much of a challenge could the Scarecrow present our own Mr. Murdock? Personally, as a Daredevil reader and a long-time Batman fan, I'd be very interested in seeing such a battle of the wills -- but only if it's written well.