While many modern security suites like Avast bundle both together, they historically focus on different threats: Anti-Spyware Specifically targets spyware, adware, and tracking tools. Targets broader threats like viruses, worms, and trojans. Detection Method
Broad scanning for malicious code designed to damage or replicate. What it Protects You From What is Antispyware Soft
Continuously monitors system activity to block spyware before it can be installed. While many modern security suites like Avast bundle
Matching files against a database of known spyware "fingerprints". What is Antispyware Soft