Here are some notes from reviewing Google Drive https://drive.google.com/ vs Dropbox https://www.dropbox.com/.
1) Google Drive gives more free space upfront than Dropbox.5GB versus 2GB
2) Dropbox has a referral system 500 mb per referral while there is no referral system for Google Drive
3) The sync facility with Google Docs makes Google Drive especially useful for prior users of Google Docs.
4) API access to Google Drive is only for Chrome apps which is intriguing!
https://developers.google.com/drive/apps_overview
Apps will not have any API access to files unless users have first installed the app in Chrome Web Store.
You can use the Dropbox API much more easily –
See the platforms at
https://www.dropbox.com/developers/start/core
iOSBut-
(though I wonder if you set the R working directory to the local shared drive for Google Drive it should sync up as well but of course be slower –http://scrogster.wordpress.com/2011/01/29/using-dropbox-with-r-2/)
5) Google Drive icon is ugly (seriously, dude!) , but the features in the Windows app is just the same as the Dropbox App. Too similar 😉
6) Upgrade space is much more cheaper to Google Drive than Dropbox ( by Google Drive prices being exactly a quarter of prices on Dropbox and max storage being 16 times as much). This will affect power storage users. I expect to see some slowdown in Dropbox new business unless G Drive has outage (like Gmail) . Existing users at Dropbox probably wont shift for the small dollar amount- though it is quite easy to do so.
Install Google Drive on your local workstation and cut and paste your Dropbox local folder to the Google Drive local folder!!
7) Dropbox deserves credit for being first (like Hotmail and AOL) but Google Drive is almost better in all respects!
Google Drive
Upgrade:
Need more storage?
Dropbox–
Current account type
  Free |
FreeUp to 18 GB (2 GB + 500 MB per referral)
|
Account info |
Other account types
50 GB +
100 GB +  1 TB + |
TeamsPlans starting at 1 TB
|
Large shared quota, centralized admin and billing, and more! |
DECISION STATS 