V3 9.0 has Smart Scan and Intense Scan function. The detection method and engine are the same, but there is a difference in the scan area.
1) Smart Scan
You scan the pre-configured areas including the Windows folder, program files folder, and registry which are the most vulnerable to security threats. Smart Scan is convenient as it provides an integrated scan for malware without configuring additional scan settings. If system infection is suspected, and you want to scan the vulnerable areas quickly, you can perform Smart Scan.
2) Intense Scan
You can scan the user-defined system areas, which seem to be vulnerable to security threats as you use them a lot or the installed programs or the installed programs or files are frequently exposed to the security threats.