CC364AC: http://www.123inkcartridges.ca/hp-toner-cartridge/CC364AC.html

CC364AC Highspeed: http://www.123inkcartridges.ca/hp-toner-cartridge/CC364AC-Highspeed.html#sku315697 

Both cartridges are compatible with the same printers, the only difference is the printing speed. We will be discontinuing shortly the regular CC364AC as to offer all our clients in the future the best option which is the CC364AC Highspeed.