MSN More Like Google Now
Early analysis seems to indicate that while their optimizal keyword densities are still quite different, the way backlinks are being calculated is growing more similar with more weight being given by the new MSN.
This will essentially make it increasingly difficult to rank on both MSN and Google simultaneously as the links are growing towards the same type of calculations and the densities are still quite different.
Additionally, MSN appears to calculating the way content is arranged on the page differently after this latest update.

