Have you actually used an Nandroid backup? It backs up everything in the phones NAND.
I can tell you, it's an EXACT restore.
It does actually create .img files by the way, I was getting confused between Titanium backup where you can select the level of compression.
I think your getting confused by what im saying, either that or im not putting it across properly.
If it restores your files and whatnot between ROMs, which are essentially new OS installs, then it CANT technically be a 'image' of the phone. As a true image of the phone/its storage areas would also wipe that new ROM with whatevers in the image.


