I read in Consumer Reports that the 46" deck on the Husqvarna (and I assume Craftsman) lawn tractors was an improved design as of a year or two ago and performed well against the competition, with and without a bagger system. But that's all I can tell you.

According to Husqvarna's Website they are a two blade design as well. I thought in the past they were a 3 blade design as well.

Here is a link that might be useful: Husqvarna Site

46's on Craftsman and Husqvarna tractors were, to the best of my knowledge, three-bladed until the redesign a couple of years ago. The current two-blade model received high praise from CR just a couple years back when it was seen that the added deck width was not too cumbersome, and still provided ample lift to supply a clean cut to a lawn.