For me, it's STLE by a long shot. I really like the gamplay and flow. The warp ramp is one of my favorite shots in pinball. I like that the ship does mutiple things with the drop target, magnet, and kickback, as well as the mount it's on that rocks and really gives a lot of feedback to the player.
I wanted to like SW, but I just don't like the layout and lack of features. Maybe it will grow on me in time.