Spammed cards differ from Sniffed cards in that spammed cards are received from spam, for example, in a spam letter it is asked to go to a phishing address and enter card data, all the cardholder's entered data is received by the carder who installed the phishing site.
Sniffed cards are an installed script in a hacked payment system or payment window that collects data as it is entered and transmits it to the carder.