Backbase compare themselves to Atlas
BackBase is an Ajax Framework and they might have seen some pressure regarding Microsoft Atlas, so that's probably why they have decided to write a comparison.
Well the article is well constructed, but even if the author, who works on BackBase, try to be neutral, the results are biased. I think it's maybe unfair to compare the two products, when Atlas is not really released and BackBase is after all an 'expensive' commercial solution.
But I recommend anyway this reading for it's fair good explanation about Ajax architecture.