Hi Matladi,
There's a lot to love in the new Office 2016 for Mac. If you're interested in upgrading, take a look at these top 10 reasons to get the new version.
I suggest you refer to this article about comparing Office 2011 for MAC with Office 2016 for MAC:
https://support.office.com/en-us/article/What-s-new-in-Office-2016-for-Mac-2a0540c7-4ce7-4c4a-8b64-6d97ebca92b9?ui=en-US&rs=en-US&ad=US
Hope it's helpful.
Regards,
Emi Zhang
TechNet Community Support
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