The key differences between vCloud Director and VMware Cloud Foundation:

 

Feature	vCloud Director	VMware Cloud Foundation
Purpose	Cloud management platform for service providers and enterprises	Full-stack SDDC platform for building and managing private or hybrid clouds
Architecture	Based on vSphere infrastructure with a multi-tenant cloud management layer	Built on top of VMware's software-defined data center (SDDC) stack with a unified, automated platform for deploying and managing virtualized infrastructure
Target Audience	Service providers and enterprises that want to offer cloud services to customers or internal users	Enterprises that want to build and manage private or hybrid clouds for their own use
Feature Set	Virtual machine provisioning, self-service portals, network virtualization, and resource allocation	Automated infrastructure deployment, software-defined networking, storage virtualization, and workload management
Deployment	Deployed on top of existing vSphere infrastructure	Requires a greenfield deployment of VMware's SDDC stack
Integration with VMware Products	Integrates with vSphere, vSAN, NSX, and vRealize Suite	Integrates with vSphere, NSX-T, vSAN, and vRealize Suite
Management Interface	Provides a web-based management interface for managing cloud infrastructure	Provides a unified management interface for managing the entire SDDC stack
Target Workloads	Multi-tenant cloud workloads, cloud-native applications	General-purpose workloads, cloud-native applications

It is worth noting that while vCloud Director and VMware Cloud Foundation have different target audiences and feature sets, they can be complementary technologies. Service providers may choose to use vCloud Director to offer cloud services to their customers, while enterprises may use VMware Cloud Foundation to build and manage their own private or hybrid clouds.