While the two apps do the exact same thing, in my opinion stoptilt is better for the simple fact that it requires less clicks to turn on per screen, and because both apps require individual screen settings, the fewer the clicks the better (especially because they have to be applied every time you exit or reset).

For instance, to setup storm rotation wizard, you have to bring up the menu, click the app, click the orientation, and then click ok on the notification.

While with stoptilt, you bring up the menu and click the app and you’re done.

While the price of stoptilt will be higher in the future, as of now it’s equal and it offers a free trial (which storm rotation wizard does not).