I am sorry to say but my ears and my analysing tools tell me that the original is wider. I am very aware of that the original has a slight wider stereo image. I am not sure why you say its the other way around. *scratching my head*Beeing so I notice that the original is narrower than your mockup. But that is easy manageable, I think.
Having said that: I deliberately chose to use a bit of a narrower stereo field because it sounds to me a bit to wide in the reference and referring to another recording like the telarc of the tschaikowsky overture seems to fit more in the ballpark of sounding more natural in that aspect with a more balanced ratio of mids vs side information. I am not sure if that makes sense to you. Other than that let me know if you have more questions.