Well obviously one is a little more true to life than the other.

What happened to the roof and hood of the aged one? Roll over or dance party got out of hand?
Tell us more. I'm assuming it's the Revellogram 1969 RS/Z-28 kit. I'm struggling a bit on the end game for mine. Looks like you masked the grill and painted the body color on the headlight covers. What about the rear panel, below the bumper, glue it on before painting or paint it separately? I'm a little stymied on that, cause I'm worried about getting the body shell on with it glued in place.