VMware designed their vSphere software with regard to the situations that can occur in the production environment, including expanding a cluster by adding new servers with different processors. Otherwise, you are likely to get an error when using vMotion.
Moreover, the strict requirement is that the processors must be manufactured by the same vendor, such as Intel or AMD. If you want to use servers with different processor models in the cluster, it is better to deploy processors of the same generation. If you are familiar with the vMotion feature, you probably remember that the recommended practice is to use the same processors on all ESXi servers for VM live migration. By Michael Bose How VMware EVC Mode Works: Complete Overview
