Well, i was a user of Kaspersky a long time ago...and i do remember it beeing verry hard for my pc resources.
But it's detecting capabilities where also outstanding. But my license was over, so i searched the forums for free AV's , so i came to Avast Home wich i used for a couple of months. In that time it saved my ass a few times from infected downloads i got via Peer-to-peer (Kazaa).
I liked the program so much i decided to buy Avast4 Pro. This is a decission i don't regret. I suits me just fine. Is low on resources (not for ram) but its doesn't slowdown my pc when running resident shield protection,...and Kaspersky did.
Avast isn't as well known as KAV, but my opinion is that it can be compared.
AVAST Better than KAV ? no.
Same security level ? maybe, KAV is verry good on trojans & worms,dunno yet about AVAST. But for ITW virus detection they are both the same.
Support ? AVAST is much better
Price ? AVAST is much cheaper than KAV
Waldo