Which of these cloud-driven stocks is a better investment right now?Salesforce (CRM -1.91%) and MongoDB (MDB -2.61%) represent two different ways to invest in the growing cloud market. Salesforce is the world's largest provider of cloud-based customer relationship management (CRM) services, and it provides additional marketing, e-commerce, analytics, and enterprise collaboration services. MongoDB helps companies organize their unstructured data with its database services.Over the past five years, Salesforce ...