No, I have bever fired a 93.
Yes, Gary I have seen the insides. You may know that the information isn't "readily available". The reason for that is because the differences are really small and would be relatively easy to replicate, if one was inclined to spend 10 years in a federal pen for the sake of owning a "neat-o" gun.
BTW- The 18 also has a slightly different Slide, to keep the G18 top ends from being able to be mounted on Standard frames.