TJack; I know they are different. The S&W is a tapered case, while the Special is straight. I think that the only drawback, if it is actually detrimental, is that the case just forward of the web will bulge a bit to fit the chamber. If it needs sizing after firing, use a 9mm Luger die to just squeeze the neck in enough to allow inside expanding to hold the bullet.
Not perfect, but it can work.