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Historical retardation of the day. Oklahoma (1955) was shot on 65mm master, but for 35mm projections, it was not just downscaled, like it was the practice for every other large format film ever shot since or before. On, no, no, you see it was shot in special 65mm that ran at whooping 30fps instead of the pedestrian 24fps. Unfortunately this made it incompatible for regular scaling down. But the madmen had an answer for this, they simply shot it on 35mm as well! Some scenes simultaneously some in duplicates. Both versions are preserved and available, it's interesting observing the differences between them, depth, resolution, aspherical cinemascope vs spherical todd-ao (of later Sound of Music fame), what's even more historically shocking is witnessing uncanny skill and attention to detail. There are scenes, that you could swear where taken simultaneously on the same take, choreography, acting, camera movement, all is precisely the same, only on closer looks it's possible to see small details that show them to be taken at different takes.
Despite all this, 35mm is better home video version. They're both only available in standard resolutions, so advantages of larger format aren't as apparent, what's worse, they also fucked up digitization of the todd-ao on several fronts.