In a few words > it's better !
I used AVG free , AVG 6 professional, AVG 7.0 full (trial).
Updates are much faster, and minimum 2 / week (AVG updates less frequent)
It's almost childsplay to use (especially home edition).
It has a much better detecion rate than AVG (wich scores bad in overall testings)
Support of AVAST is awsome ! really is !
AVAST saved my sorry ass multiple times now ! incredible.
It kicks right between the balls of AVG !
Only 1 choise, make no mistake my friend > AVAST! 4 HOME / PRO
Waldo