Microsoft Azure Backup Recovery Type Snapshots and Vault Vs Vault


Recently we started to use Microsoft Azure now we have successfully. deployed few virtual machines in azure platform. Since, we needed a backup for our virtual machine we started to do a trail test and configured backup for one of our demo virtual machine. So, far everything seems fine but I have a very basic question please refer the below image:

What is the different between Snapshot and Vault and Vault in recovery type. The setting is same but I Dont know why backups is creating different recovery type.