I thank each of you for your perspective on this issue.
It is hard to interpret these test since I am a novice.
I have been trying to compare Avast Free with Avira Personal(Free), but it is difficult because most of the test use Avira Premium which has some added feature.
Now I learn that the testers don't even use all the features of Avast in their test situations.
Very difficult to make a clear comparison.
Your experience and comments are truly helpful.