Citi- Most of their products are meh, the real good ones are the Forward, the American Airline cards and the Hilton card. Everything else is meh..
Prime or not prime is about the quality of the borrower who gets the card, not necessarily about what you think of the offer.
The other thing is that most lenders participate in a range of markets. Cap One offers cards in the sub-sub-prime, sub-prime, prime, and super-prime markets. That's two very different classes of customers, and they have different products for it. Chase offers some of its cards targeted into the prime and sub prime market. (Really, a card that comes with a range of interest rates from 12 to 23% is for more than one group....)
There are some differences between lenders. Capital one doesn't think people ever move from one bracket to another, while other lenders will change the terms when the customer's credit improves.