I am not sure I have never been to the grand screen.
I tend to only go to see the movie in the grand screen. It is noticeably larger, the sound is much cleaner and the seats have a lot more room and recline.
It's not a true IMAX however proportionally it is larger than a standard theater screen my only negative they have the volume Extremely Loud in that showroom
It's worth it
A couple inches bigger
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