Comparing all the cloud offerings is quite a challenge. Here the best resources I could find so far:
And here some third party information:
Some other cloud service providers:
https://www.ovh.ie/ several DCs mainly IaaS and VDI
https://www.digitalocean.com/ several DCs and nice SaaS portfolio for developers
http://www.dimensiondata.com/Global/Solutions/Cloud several DCs for IaaS
Anything missing? Let me know and I’ll add it to the list.