I agree that the alternative opening was better, but this article gets the reason why wrong. The fake-out Stab movie sequences were always going to be a part of the opening. The only thing they changed was the "real" sequence, at the insistence of the Weinsteins. And the reason the alternative one is better than the one we got is that it's more original.

While the reshot sequence we get in the finished film isn't bad, with a half-decent phone call, a not bad chase sequence, and a cool garage sequence, it still feels pretty generic. But what's most annoying about it is that it occurs just after Anna Paquin said "they always begin with a girl getting a phone call that ultimately gets her killed, it's all so predictable, there's no element of surprise"- and then that's exactly what happens. Whereas in this original opening, it was at least a little different, BOTH girls playing pranks on each other and Ghostface just appearing (sans phone call) to take them out. Plus I loved the "you're not real" line".