I came from sysadmin background and regularly have to compare AWS, Azure & GAE. My company is PHP shop which use only IaaS & PaaS. Basically nothing beats AWS

I came from sysadmin background and regularly have to compare AWS, Azure & GAE. My company is PHP shop which use only IaaS & PaaS. Basically nothing beats AWS on IaaS and Azure seems to be the best for PaaS. I'm comparing in term of cost, feature and ease of implementation/maintainability.