At a glance, they are significantly different.
Google application seems to cover just a drop down shade and the actual notifications in the status bar.
Apple's covers the shade, the actual notifications in a different way than google and the interaction and grouping of notifications on a lock screen.
I suspect they'll both be granted. Doubt Google will use theirs at all, but I would suspect Apple to immediately file a claim on it against Samsung, because that's what you do when you have a legal battle like Apple and Samsung are having. You find anything and everything that might have a little bit to do with whatever you're filing about and tack it on in the hopes of burying the other side in procedure.
In my opinion, none of this should be covered by patent law. This seems to all fall squarely under copyright as 'forms of expression' of a notification system, not an original invention.