With Office still available as a suite to install in the normal way, why consider Office 365 instead of Office 2013? For that matter, why shouldn’t you stick with an older version of Office, if you already have one on your PC?
Outlook and licences
One of the biggest problems with Office Home & Student – the main standalone suite offered to home users – is that it doesn’t include Outlook. The applications you get with Office 365 University (a four-year subscription available to college students and staff) and Home Premium are equivalent to Office Professional 2013, adding Access, Outlook and Publisher to the usual four of Word, Excel, PowerPoint and OneNote. Business and enterprise subscriptions include Professional Plus, which adds InfoPath and Lync to give you the entire, nine-strong suite.
There’s also the number of users and devices to take into account. Office 2013 consumer licences are for one user on one device only; business licences allow this user to install Office on a desktop and a laptop; Office 365 lets one user install all the apps on up to five devices. Office 365 Home Premium goes further by allowing up to five users in your household, making it ideal for a family with several PCs, laptops and tablets.
t doesn’t even matter if you have a Mac or two, since Office 365 lets you run the latest version of Office on those, too. You would have to spend an awful lot on Office 2013 licences to get the same package offered by a single Office 365 Home Premium subscription. If you’re buying for your own use on one PC, it isn’t as impressive..
Upgrades and extras

Office 365 subscriptions include updates to new versions of Office as they’re released. If you buy Office 2013 through the retail channel, you’ll have to shell out again to get the next version. Business customers buying through volume licensing get upgrade rights only if they pay extra for Software Assurance.
Home users of Office 365 get an hour of Skype calls with their subscriptions – covering calls to Skype, landlines and mobiles – and the subscriber can choose how to share this benefit with the other users in their family.
You also receive an extra 20GB of cloud storage through SkyDrive in addition to the 7GB Microsoft gives to everyone free.
Business services
You can receive free email via www.outlook.com to go with any Office 2013 package, but Office 365 business subscriptions give your own domain with addresses @yourcompany.com and tools to administer your email through Exchange Online. To match the features provided in Office 365 business subscriptions, you’d have to buy, install, configure and run your own Exchange server, SharePoint server and Lync server.
The costs of the server hardware, server software and client access licences would be considerable, and you’d need to employ your own skilled administrator, or buy in the services of an IT consultant, since these products aren’t easy to manage.
Buying Exchange, SharePoint and Lync online services through Office 365 frees you from the cost of running your own servers in-house, and considerably simplifies the administration (such as letting someone else worry about backups). Keep in mind though that Telstra has been somewhat slow and uninformative when it comes to rolling out major updates to Office 365.