When you add a full mag to the Glock the difference does become massive, as one would expect.
I can attest-owned two sp 101's, .357 and 9mm and have the same in the LCR, that the LCR is far more pleasant to carry and is comfortable to shoot in 9mm and bearable in .357 with full magnum loads. The sp is very comfortable to shoot in either caliber, providing one is able to pull the trigger on the 9, the Mrs. could not, but really very unpleasant to belt carry and impossible to pocket carry or the model was for us.
It is said that the sp is built like a 'tank' and its size and weight certainly made it feel like I had a tank on my belt or in my pocket-plus its a cast frame, ounce for ounce forged guns are stronger than cast.
Yes our opinion, but we have had both models, only the LCR makes sense for cc for us.
And remember, I wouldn't mind owning the Colt myself-something about the name and the reputation, which of course brings up the topic of just how good are the new Colts compared to the old ones- those that I almost bought so many times so long ago.
I believe the first handgun I was issued was a Colt Official Police, or something to that effect, pencil barrel (?) and extractor rod that just hung out in the open, no lug-really did not care for the looks.