Quoted from RobT:Why? They usually don't play the same. I have MB, MM and AFM. Similar fan layout. They really don't play very similar, especially AFM.
I have yet to read a review by anyone familiar with both ST and SM say that they play or feel the same.
I think if you take away the theming elements from both (art, lights, audio, dots), they would end up feeling very similar as whitewoods. Same number of shots. Almost the exact same shot location. Same three-flipper arrangement with the *exact* same side ramp shot angle. This isn't just the old argument of one fan design looking like another, this is actually SM's layout with some adjustments. With the unlimited creativity that can be expressed in pinball designs, in a 4 game collection there's no room (in my opinion) for two games that offer nearly identical challenges.
Is ST's layout better than SM? Very likely - I know when I revise something, it typically gets better. Like the change to the behind-the-upper-flipper-shot, which was originally created for SM but done too late to enter production. And if I didn't already have SM, I really wouldn't care one iota about the similarities. But I do own that game, and since SM is a very recent title and also very popular design, doing what essentially amounts to a re-theming this soon seems... cheap. Even lazy.
This is, of course, merely my opinion, based on the unfortunate coincidence of already owning a great game that happens to have been the basis for another game featuring a theme in my top five all-time favorites. So, I reserve the right to be personally disappointed!