Rise To Power (Morello Tom)

You could just say that managed seicrves only compare to SaaS, and cloud computing is a more general term covering all layers IaaS, PaaS, and SaaS. I would also argue that cloud computing is a lot more than just managed seicrves. It needs to be agile & elastic, interoperable, portable, scalable, monitored & metered, cost-effective, and so on.