I've narrowed down my setting to two choices which fit my budget: an all-14k white gold tulipset style and a simple 4-prong tiffany (we didn't want to consider a 6-prong.) In which setting is the diamond likely to be more secure? I realize that platinum is stronger, but the 14k tulipset crown has more metal and therefore might offer more protection. We can't figure this out! Thanks for your help.