The pool principle
Instead of package limits per server you buy total capacity: the Starter pool brings 16 cores, 32 GB RAM and 240 GB SSD, Enterprise 24 cores with 64 GB and 500 GB — and the Custom pool is assembled freely in the portal. Within that capacity you alone decide how many VMs exist and how large each one is. A big database VM next to five small services? Twelve equally sized test machines? Either is just a matter of allocation.