I agree they are different, but symbolism can be helped along by nostalgia, and also by stereotypes and caricatures. And by reading books about symbolism. Steve's GTO photo might be nostalgic for him because that was his personal experience. My experience was very different and I don't get nostalgic looking at the photo. But the car, hair, clothing, and the black-and-white image combine for me in a generic way which might be tending toward symbolism.