Know More is a pre-Bezos product. Bezos took over on 10/1 and know more was launched on 10/7. Meaning planning and development on Know More must've started before Bezos' control.
I don't think there's been much change to the print version. Most of the changes seem to be a bid to grab some of the Gawker/HuffPo/etc. online market in the news-esque blog sector. More infographics, making deals with some high-traffic blogs to bring them inside the fold (e.g. the well-known libertarian legal blog volokh.com was rebranded as a WaPo blog), that kind of thing.