Sorry if im offtopic but I asked them in the forum and they only use K's signatures and cloud detection, they have their own application control, BB and heuristicsActually, ZoneAlarm is like a rebrand of Kaspersky. Signatures, heuristics, cloud, system watcher everything is the same. The Firewall is different and the UI. Andrew3000 has tested it recently in the hub.
So, if you're not into ZoneAlarm's firewall and have no problem with Kaspersky being Russian then using Kaspersky would probably be better choice as I heard ZoneAlarm is heavier on the system and some other complications.