It depends on what programs you use the most. I personally use Excel the most and I have a monthly financial breakdown sheet in which 2013 offers me flash fill feature that has increased my monthly revenue stream by 12%. Just kidding, but no, it's an awesome time saver.
I personally love 2013, I find it's the best Office version BY FAR. It's so uber smooth and juicy, the UI is very clean looking, the Backstage view (Start Screen) is more improved over 2010, and has some new features in the apps themselves than 2010 did over 2007. Again, this depends on if the features are worthwhile. If you use Word a lot and read documents or work on them, a new feature is this bookmarking feature thing where it goes right where you left off in a document, REAL handy for sure. That, along with MUCH better improved SkyDrive integration, so if you do work on a document between multiple PCs, you can have that document saved to SkyDrive, work on it from home and work on it from your browser elsewhere from Outlook.com. From there, you can go home and the changes are downloaded right away. Time saver.
Also for pricing, 365 beats out 2010. Office 365 is the more cloud based/subscription based version of Office 2013. It's the same thing, but less expensive. Some will debate the merit of that, but it's a tad pointless. Basically, you get the 2013 equivalent of Pro Plus, so ALL the Office apps, along with 25 gigs of SkyDrive storage (handy to use for photo backups) and able to use a license up to 5 different PCs. All of this for a total of 100 dollars a year. You can basically pay as you want, so if you're in school and have major white collar work to do (i.e. Word) for a few months, you can pay 10 dollars a month if you like to use the installed Office apps. You get a 30 day grace period though to reactivate the subscription though. This is better than the elder method as you will get upgrade to Office 2016 or whatever it is for FREE, whereas if you just bought 2013 Home and Student for 150 or so dollars or whatever it costs, you would have to pay that again to upgrade. BUT, 365 includes all the Office apps, like Outlook. So if you use that, you actually would have to pay 500 dollars for Pro Plus.
Basically, you can pick and choose to do whatever you want.