My Graphite DV SE has the inner bezels from a very early (99?) DV so yes, i can verify the slotload bezels are 100% interchangable with each other. Thre is a difference if I recall in the position of the CPU heatsink in the metal chassis itself which makes it very ill advised to put 350/400/450 logic boards in 500/600/700 chassis and vice versa. And well, my experience has it at least that the later ones actually have worse plastics than the early ones. Obviously this is dependant just as much on the environment and manufacturing variations from batch to batch, but well... there seem to be plenty of early iMac's have come through my hands with nice pliable grey plastic inner bezels, even from non-airconditioned mid-2000's public school computer labs etc. Meanwhile I've never come across a 500 or 600 mhz machine with good plastic... some are better than others but all tend to be varying degrees of brittle and beginning to yellow. Every single one.