I have a layout where the memory usage is 381 MB, why does if I copy it to another project it shows 266?
Maybe some additional objects are created in the first project. Or maybe the objects in two projects are different. Say, both projects have Player sprite, but in the first project it has more frames in the animation.
What I do is select all the sprites from the layout of the first project and paste them into a layout of the same size in the second project, or copy the layout and paste it into the second, the animations are all reported
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I don't know what to tell you. Try pasting the layout into an empty project. If the memory usage is still different, run both projects side-by-side in Debug Mode and check every object.
Various project settings can affect memory use, including the downscaling quality and max spritesheet size.