I see what you mean about the copper proofs. The pic of the higher hammer price 1853 penny, for example, doesn't bring out the shimmering iridesence, and superb, red, green/blue toning in the legends, more typical of this date. If you didn't know, and someone told you it was a currency strike, you'd probably believe them. Of course you get the full effects when rotating the coin through the angles.
The pic I took of mine doesn't bring out the best, but I think it's a little better than Noble's pic.
Noble's pic