No. Has ESS cause any troubles for you.The comparative sites are based on money games I think.Wait for the next report or some other sites test report and you will find a lot of differences and get confused more.If you go by these reports you will have to install a new antivirus every fortnight or month. I have used both avast free and Nod32. Eset Nod32 is the lightest and gives less false positives whereas avast slows down the PC as compared to Nod32 but it is also light on resources and free.Currently I am using Nod32 and when the licence ends next month I will switch to avast free again.