Hi Pondus,
I always check the scan results for the most recent update and against other scans.
It is the only scanner that provides defacement on website detection and SEO redirections for that matter.
When accurate detection Sucuri is found to miss most of such detections, Quttera's is known to detect more.
Website Security Check finds defacements but often flags them as kind of spam.
All of the above are not reported by VT. As I also report malicious and suspicious websites at WOT
they have some, but also do not flag malicious defacements.
polonus