The majority of the credit cards are aimed at the higher classes of society, two of them actually at the very top. For this reason, they are rather expensive to maintain and use. On the other hand they offer really exclusive, I think sometimes even unnecessary, services to attract their top clients. From this category, I would pick the Diners Club International as the better choice for cost/value reasons. Both banks offer it at pretty equal conditions. If I were to choose VSA Cards I would probably prefer the Tatra Banka against the HVB-Bank. For TB offers broader, more flexible and variable options with it VISA Cards and additionally an interesting virtual VISA.
AURA Card- product of Cetelem can be a relatively low-cost and smart option available also to middle or lower-middle classes that want to have money at hand. More detailed information can be obtained at:
http://openiazoch.zoznam.sk/produkty/kk/
http://www.tatrabanka.sk
http://www.cetelem.sk
http://www.hvb-bank.sk.