do not see the difference
These rules appear to primarily protect the MS store and carriers from competition, just like Apple. There may some clarity on the initial details, but the disclaimer "Microsoft reserves the right to update these policies as needed to protect the Windows® Marketplace for Mobile service or the users of the service " would tend to indicate that it is possible for them to restrict applications on an ad hoc basis by changing the rules. Just like Apple, the process does not seem to include a public hearing. If MS receives complaints, MS has no part in the solution, so, presumably, MS will mandate a solution that the ISV can either accept or leave.