good topic, I actually don't think I ever noticed the difference in the tops of the salt and pepper shakers. Although this brings to mind a funny story about my dad, bear with me here. you see about a year ago I bought a pepper grinder, before that I just used the stuff that comes preground that you buy in the bulk bins at the market, anyway I'd heard that once a person started using fresh pepper, thay'd never go back to the preground. Well I was a bit skeptical, so I was using only the fresh pepper for everything for about six months or so, and anyway on evening at dinner, my dad who has this thing about not liking new stuff, asks my mom to pass the pepper, and seeing as we had both the pepper grinder and the old pepper shaker on the table she just instinctly passed him the old pepper shaker, he looked at her and said 'no, I want that one' pointing to the grinder.
Hope this makes you smile or at least gives you a bit of a chuckle for the day.