The functionality on the Android devices is a little better as it has the "commenting" feature while on the iOS tablets/mobile devices commenting is not there. But like on a computer, you’ll be able to see other people’s edits instantly as they’re made which takes collaborative writing to another level of cloud computing. You can now also watch Google Presentations on a mobile device.
This upgrade makes me think that using Google Apps in a BYOD (Bring Your Own Device) learning environment is much more feasible and affordable for schools. Or, setting up a classroom as blended environment using a combination of devices for students to allow both full functionality/creative tools to handheld mobile devices~ with some full suite laptops or desktops in the room that are priced in the $500-$600 range combined with Nexus 7 tablets at $199 (you could use iPads but at $500 each the Nexus 7 is more affordable). In addition, in the blended classroom students could use their own smartphones or hand held devices for the less intense creative work as well. Things like; document editing, reading, Internet searches, watching videos, recording short video/audio, managing their calendars, checking email, and leveraging some of the many mobile device apps for learning.
read more on the upgrade