This site explains the key differences between vSphere 6.7 and vSphere 7.0. An overview comparison from all vSphere Versions is available here.
| Released | ||
| End of Support | ||
| End of Technical Guidance | ||
| Physical CPUs per host | ||
| Physical RAM per host | ||
| vCPU per VM | ||
| vMEM per VM | ||
| VM Hardware Version | ||
| VMFS Version | 6.81 (VMFS6)  | 6.81 (VMFS6)  | 
| Fault Tolerance Support | 128 GB  | 128 GB  | 
| vCSA Operating System | ||
| Management | HTML5 Client  | |
| vCenter Type | Windows  | |
| vCSA Scale | 35000 VMs  | 40000 VMs  | 
| vMotion | Per-VM EVC vGPU vMotion  | Per-VM EVC vGPU vMotion Logic Optimizations Reduced Stun Time Reduced Performance Impact  | 
| DRS | ||
| Virtual SAN | HTML5 Interface Support Fast Network Failover Microsoft WSFC 4k Native Device Support FIPS 140-2 Level 1  | Simplified Management Native File Services Enhanced Cloud Native Storage Enhancements Stretched Cluster Enhancements 2-Node Topologies Skyline Health Improved VM Capacity Reporting Improved vSphere Replication Hot-Plug NVMe Devices Improved Flexibility for Shared Disks  | 
| Tanzu | ||
| Container Runtime | ||
| Trust Authority | ||
| ESXi Lifecycle | ||
| vCenter Server Profiles |