In addition to the above 3 differences, Office 365 is the foundation of a complete SMAC Solution (Social, Mobility, Analytics, Cloud) over which you can deploy various solutions. Not so with Google Apps.
Next point of comparison is to check how the individual components of Office 365 and Google Apps stack up. Please refer to the individual workloads of Office 365
We keep exploring the Office 365 and listing the new stuff all the time. We have listed out various components of Office 365 and the features. We also have a short video on the page which explains Office 365 in 5 minutes. Please click here
We strongly believe that the combination of the rich feature set of Office 365 and our focused expertise of the implementation of the Office 365 Platform will ensure that we will continue to delight our Customers