Public? Private?  The service models are different and certainly the value propositions are different. 

“At the Cloud Computing Expo held this week in New York, executives from Microsoft (MSFT) and Oracle (ORCL) shared how they see cloud computing working its way into the enterprise.

The companies offered disparate visions, however, with Microsoft emphasizing its public cloud offerings and Oracle touting tools for building out internal clouds.

Both software giants agreed, however, that enterprise use of clouds is best done on an as-needed basis, in what their executives called ‘a hybrid model.’”

Link here.