Images you insert using the AutoCAD IMAGE command are completely compatible with images you insert using the AutoCAD Raster Design toolset Insert (iInsert) command. For example, if you insert images using the AutoCAD Raster Design toolset Insert command and then save the drawing, the images are displayed and correlated if you open the drawing using AutoCAD without AutoCAD Raster Design toolset.
AutoCAD stores only one definition of each image you insert into a drawing, even if you have multiple copies of the same image in the drawing. The definition is referred to as the image data definition, while each copy is referred to as an image insertion. You can manage the data definitions and insertions in your drawing with the Image Manager toolspace. For more information, see Image Manager.
Unlike AutoCAD, AutoCAD Raster Design toolset respects correlation from various sources. Whenever you insert an image using Insert, AutoCAD Raster Design toolset searches for correlation data associated with that image. Then, you can decide which source to use. These correlation sources include correlation that was saved in the image file, resource files, world files, and the defaults that you specify in the AutoCAD Raster Design Options dialog box. For more information, see Correlating Images.