Not really no, they introduce analogue noise. Just that the grain structure on the digital tape is pretty much gone when MPEG2 compression kicks in. Have a look at ESB -1 grindhouse and compare it to the GOUT" DVD. You'll see that the grain covers the whole of the image, and it dances, whereas the DVD has some of it only in part of the picture because the rest is smoothed out with MPEG2 compression, and much of it doesn't dance like it should. DVD tends to present this unnaturally static grain.