yes and no the grip on the SD is thicker from side to side but shorter from front to rear. Overall its a little smaller than the Sigma not by much though. The grips on the SD and Sigma are not the same.
If I'm not mistaken the grip is slightly wider on the .40 than the 9mm. As the .40 mag doesn't fit in the 9mm frame. Not to worry it's not a noticeable difference.