Backup Healthcheck - "During the health check, Veeam Backup & Replication performs a CRC check for metadata and a hash check for VM data blocks in the backup file to verify their integrity. The health check helps make sure that the restore point is consistent, and you will be able to restore data from this restore point." source - https://helpcenter.veeam.com/docs/backu ... tml?ver=95
A SureBackup job is a task for recovery verification. "The SureBackup job aggregates all settings and policies of the recovery verification task, such as application group and virtual lab to be used, VM backups that must be verified in the virtual lab and so on. The SureBackup job can be run manually or scheduled to be performed automatically." source - https://helpcenter.veeam.com/docs/backu ... tml?ver=95
Basically as Dmitry mentioned Health check is going to check the actual backup files, SureBackup is going to make sure the backup files can be recovered from i.e bring up a group of virtual machines from that backup file, power on and perform tests against the VM, OS and App.