Differences between Hyper-v checkpoints
Point in time images, using backup technology inside the guest ( Volume shadow copy / File System Freeze ).
Reliable for production environments.
It doesn’t save the memory state
This now default config on all Windows Server 2016 VM’s on Hyper-v
Saves the memory state of all running applications, not just the state of the virtual machine. Mostly used for test scenarios.
Not reliable for production roles as SQL, Exchange, Active Directory.
You can check all the checkings on every VM in case that you may want change to standard mode for testing purposes ( properties of the VM, management, checkpoints )