Welcome to the Forum from Nevada! If you look at the mag base plate between the two, the G2S does look different. Someone should be along to answer your question.
I'm back: just found this Q&A in the comments section on YT. You'll need to bring up the original to view the comments:
I'm back: just found this Q&A in the comments section on YT. You'll need to bring up the original to view the comments: