Why does every time when someone asked if they should go for Cartier or Tiffany, someone always tries to divert them? If they can afford it why not? Tiffany and Cartier are luxury brand, for people who can't afford it, of course it seems illogical to spend that kind of money.
I loved that dig, the one you just made there by assuming that others cannot afford to spend their money on the brand therefore we suggest someone go elsewhere. Many of us that suggest OTHER do so because we know that they can get more for their money--i.e. bigger and better quality stones for their amount of money--regardless of what they're able to spend, elsewhere. Just because it's got a fancy brand name doesn't make it the best on the market. It makes it well-marketed and highly priced with assumed prestige.
I've helped many people on here purchase from either company. This isn't a brand-bash. My reason for suggesting "neither" in this case is because the stones and settings will be in your ears on your head, and no one, not even you, is going to see the settings without you taking them out of your ears to know the difference, and no one besides you is going to know anyway unless you tell people they're from someplace specific. Why not have a hand in selecting the actual stones you're paying for and know that you're spending your money on
the best there is, not what someone tells you is the best strictly based on what's in the store at that present time to make a sale?
That is true luxury. Sure, both outfits have some decent stones in their inventories, but you really have to have a salesperson willing to help you find them from the stock on hand, and most of the salespeople are going to do their best to sell you what is in the store at that time.
I own Tiffany pieces, diamond and otherwise. I have owned a Tiffany engagement ring in the past as well. But I am also a gemologist with significant training and education and enough experience to know quality diamonds. I have found better outside of Tiffany and Cartier and have spent countless hours poring over supply from both companies to help posters here and consumers outside of here find the best both have to offer. It's not often a big list of winners.