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Actually, I'm pretty sure Sycamore uses the same model for both, mainly since cutscenes aren't loaded in Pokemon X and Y, they just happen (this is because they simply use the camera to create a multiple and moving perspective scene).
The problem with that comparison, however, is that one picture is larger than the other and they're both for the same system. This essentially means that Sycamore's picture is stretched, while the ORAS picture is at native resolution, making the former blurrier than it actually is and the latter sharper by comparison.