Not all clouds are equal. More specifically, not all elements, components, mechanics, attributes and specific optimisations inside different clouds are provisioned, planned, built and deployed or even maintained equally.
But to call all different clouds in some way inherently imbalanced would be a misnomer; every instance of cloud is (or at least should be) equal to and commensurate with the tasks that it has been brought into being for. If there is any inherent difference, it is simply that there are different engine sizes out there driving around the virtualised supercomputing highways that are now defined by the existence of cloud itself.