Credit cards that are marketed as platinum credit cards are likely to offer more extras than ordinary credit cards. Originally, gold credit cards and platinum credit cards were supposed to be available only to those people who earned a substantial salary. However, the required salary for many platinum credit cards is barely more than national average earnings.
In fact, credit card companies marketing platinum credit cards are doing just that a marketing exercise. What you are likely to get from platinum credit cards that you wont get from ordinary credit cards is, perhaps, a larger credit limit on the grounds that you should be earning enough money to be able to afford to pay the higher monthly repayments that would go with it.
In addition to more credit, platinum credit cards may offer extras such as travel insurance, discounts on car hire, hotel bookings and special promotional offers on luxury goods such as wines.
However, platinum credit cards may not be cheap credit cards. The APR interest rate on your platinum card may be no more competitive than the rate offered on an ordinary credit card and you may find that you are paying for those extras and special discount offers by paying more interest than you really need to.