Unfortunately its now a price issue as both have pros and cons. I'd personally prefer Google Apps mostly because of their Exchange, from my sys admin days (exchange 2003), always needed 3rd party anti-spam to perform decently and if this is hosted exchange, well I don't know.
One plus I see for Google Plus is the chat which talks to regular Google Talk outside the organisation. Gmail is widely used so this is great. Instant messaging on 365, well, who still uses Hotmail in these parts.
The web-based viewing and editing of Word, Excel, PowerPoint, and OneNote files that Office 365 offers is kinda not that big an issue for me as Dropbox ensures i have all my files everywhere and can edit them.
The 247 support for both is probably not that much useful for someone buying from Zimbabwe unless they have local support, which I doubt is the case.
Glad to know what they others think.