Originally Posted by nall

Bronze cards earn 1 mile/$2 and have no annual fee.
Gold cards earn 1 mile/$1 and have a $50 annual fee, plus a few benefits.
Platinum cards earn 1 mile/$1 (2 miles for AA purchases) and have an $85 annual fee, plus a slew of benefits.

Here are links to the two gold cards if you're so inclined:
Visa: https://www.citi.com/credit-cards/cr...l-credit-cards
Amex: https://www.citi.com/credit-cards/cr...l-credit-cards