Hi, this is Jonathan from Kontera. I think it's fair to say we have far better ads as we work directly with such big brands as Microsoft, L'Oreal, Nintendo, Showtime, Toyota, McDonald's, Kmart, and more. That said, Kontera is intended for a certain type of quality publishers, and if you don't have content written in the areas our advertisers are targeting, or readers in the regions our advertisers are targeting, you may not see the same differentiation that most of our publishers experience.
Paxwill, regarding your point about other ad networks eating into your AdSense revenue, luckily that's not the case with Kontera. As Kontera and AdSense are displayed in completely different areas of a webpage, they don't cannibalize each other's clicks, and by using both you'll only add to your overall revenue.
Your best bet to determine if Kontera is right for you is either contact me or our Support Team, and we'll give you an honest assessment :)