EyeonTips:Script/Reference/Applications/Fuse/Classes/Image/CopyOf

From VFXPedia

• Copy() is a generic function that all parameter types may implement. CopyOf() is specific to Image. The only real difference in behaviour is that CopyOf() may be interrupted if the tool is told to abort. Copy() will always complete the copying across of pixel data. It is generally a better idea to use CopyOf() with images, but either will work. (email from Stuart MacKinnon, eyeon)