Well, I just took a pic with that in mind, and spent a few minutes looking at the grooves on both, and at one point, I thought I could see a difference, but in the end, I cant say that I do. I can definitively see the OAL difference, but nothing with the extractor groove, but that doesn't necessarily mean something couldn't be off there?
If someone had shown me these two rounds and asked if I thought the case length would result in what I saw happen, i'd have said no, simply because it was so minute, but I guess that's just ignorance on my part as to how well made these modern pistols really are...
No doubt, this has been a great learning experience!