It is not normal for SkeletonAnimation to appear blurry compared to SkeletonMechanim. Blurriness can often be attributed to texture import settings in Unity. Ensure that the texture's Filter Mode is set to Point (no filter) if you are working with pixel art, or adjust mipmap settings if they are causing issues. Additionally, check the Max Size setting in the texture import settings to ensure it is not limiting the resolution of your textures. If the issue persists, it might be related to the material settings or the quality settings in Unity, which could be affecting the texture resolution.

rmx As Spinebot has already answered, there is no such thing as blur when using a SkeletonAnimation component. So there must be some reason why your Unity project appears to have a blurry skeleton, but we do not have detailed information about the state of your Unity project, so we cannot give you any further advice. If you create a minimal Unity project that can reproduce the problem and email it to us, we can investigate the cause: contact@esotericsoftware.com