I’ve not seen one of these kicking around anywhere so I’ve created one based on the information from the Microsoft web site.
You can download the spreadsheet and filter it based on your requirements and see which SharePoint online plan meets your needs. All the feature names retain their original link back to the Microsoft page for further research into what the feature is and what it does.
For example you might want to ensure that you can get additional storage, so just filter on the Feature Name column and select Additional Storage –
and you’ll end up with a nice filtered view of the plans that allow you to purchase additional storage –
You can download the spreadsheet below – it is correct as of 23/05/2013. Check the MS website for any more recently published information before making a purchase decision.