Scream has a better character menu, while Halloween has a better avatar (Michael Myers) presentation.
Scream appeals to the horror film fan looking for an exposition on the intrigue behind thrilling fear, while Halloween appeals to the horror film fan looking for a spotlight on the eeriness of a haunted town.
If you're interested in bloodlust, then go for Scream, but if you're interested in folk goosebumps, go for Halloween.
The Scream killer(s) are great paragons of youthful angst, but Michael Myers is the king of fog. It's already been said on this thread --- you need someone like Leatherface (from the
Texas Chainsaw Massacre horror film franchise) to compete with the likes of Michael Myers, but Scream does provide great hellfire theatrics.
I'll have to give the edge to John Carpenter's creation, since there's an undeniable phantasm associated with Halloween Eve and the panic of someone morbid lurking around in the shadows and fog.
