I prefer static for a number of reasons:
1.) The spectator can examine all the cards before and after in static.
2.) You can keep the static gimmick in your deck and do other tricks with that deck and the spectator will never notice, with the gimmick for scared, they will. (One time my spectator accidentally pick the gimmick card during a pick a card trick and they didn't even notice that it's there. They're holding the gimmick!!!)
3.) The spectator handle the cards themselves, you get more audience participation and the magic happens in their hands.
4.) There are two surprises; the deck cuts itself and their card shoot out five feet away from the deck.
5.) More presentational possibilities.
6.) The deck is squared when you place it down, with scared, the deck CANNOT be squared.
Well, I highly recommend you get static, it's way better than scared and the price is $15 less. I own both static and scared but static gets better reactions and I use it daily. If you don't get static, you'll be missing out on a whole lot.