:( There are comparative reviews out there - with just about as much credibility :( . Never underestimate the technical savvy of scumbag endeavour - not only do they produce genuinely nasty products, named to confuse (and cause immense trouble), but they're not beyond writing reviews as well! :(
The "real" AVG, Ad-Aware, and Spybot S&D caught my attention when I was looking at various UK university websites; the same names came up again and again - from professional but cash-strapped IT departments. Dunno - but for me a better level of recommendation, when I don't know who's written the review - or why!
All best - Gavin