ELI5: If I have an older, yet up-to-date Anti Virus, does it defend me from the same viruses as its 2017 version?

If, for example, I have AVG's 2015 version and its fully updated, does it defend me from the same viruses as the 2017 version of AVG?

I understand the 2017 version might have more FEATURES, but in terms of Virus signatures and "red flag" moves, wouldn't they be the same?

Submitted October 31, 2017 at 06:49PM by forrealquestions http://ift.tt/2yi20xN