I also have owned both, key is I still own the SD40, but not the SR. There are reasons for that.
The SR40 was such a nice looking gun. And, thats about all it had. The only other good thing about it was the accuracy....when ever it worked, which was rare. Four trips returned, great customer service, sold on it's last return as it was a new replacement. Only firearm I've ever hated is the SR40.

DR