This is going to sound harsh, but the SM at DL is so much better than the WDW one. I was at WDW in May, and got free airfare in hotel out of nowhere for DL in August. The difference was shocking. Its just a lot better at DL. Its actually near complete darkness except for the stars and they've done something to the supports so you dont see the track and struts, thats really cool as its more surprising. The ride is also faster and smoother. You sit side by side too, which is nice I think as two people can ride up front, each car holds more people too.
Its just a lot better. Its not a slight difference like the difference between the two SMs, its pronounced and I hope they close SM and do this. Im always sad when something is closed I like but in the end when Im actually there I hardly care, theres so much else.