The unlimited data from Google is more or less a marketing gimmick — an effective one, but a gimmick nevertheless. Microsoft found in a recent study that three out of four users have less than 15GB of personal data on their PC. For all intents and purposes, 1TB is the same thing as unlimited for almost every user. In fact, Microsoft should just match Google and call its 1TB "unlimited".
The "right" cloud storage option for you also depends on your PC and mobile platform choices. While you can technically use OneDrive from an Android device, or Google Drive from a Windows PC, the different ecosystems are increasingly integrated into their respective cloud environments. OneDrive is tightly woven into Windows and Windows Phone, and Google Drive forms the backbone of the Chrome and Android operating systems.
Cloud storage is becoming somewhat of a commodity, and your decision should be based on more than just price per gigabyte of storage capacity. Aside from the cost of the cloud storage, you should consider how and where you plan to use it, and how well the various cloud storage options integrate with the PC and mobile devices you use, as well as the office software you need to get things done.
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