Google's snigger at Apple is an altogether more subtle one.
The Google Photo app has a very useful feature of backing up photos in the cloud the moment they've been taken (depending on your wi-fi and data settings). The 'Free Up Space' feature allows you to hit a button and do just that - free up space by deleting photos that are safely in the cloud.
It's a life saver for anyone rocking a 16GB iPhone: many owners will know the pains of having to delete apps, photos and songs just to squeeze a few extra images in.
Now, Apple's cloud storage service also offers this feature, but caps free online storage at 5GB. Google's service is unlimited and totally free. The ad could twist the knife even more by mentioning this lack of charge - but Google apparently isn't feeling that cruel.