Difference between HR Case Transfer methods

[Mr world wide]

There are 2 types of HR case transfer methods:

Reclassify	Standard
The HR case number does not change after transferring an HR case from one HR service to another.	The HR case number changes when transferring an HR case from one HR service to another. Both HR case numbers appear on the HR case for reference.
Links redirect to the new case.	Links do not redirect from the original case to the new case.
Work notes copy from the original case to the new case.	Work notes do not copy from the original case to the new case.
Notification emails are not sent for reclassification cases.	The subject person receives a notification email with the closed case and transferred case information.

[Miguel Donayre]

It's defined in the documentation below. Which it looks like you got your information from. 

https://docs.servicenow.com/bundle/paris-hr-service-delivery/page/product/human-resources/concept/re...

[Mr world wide]

Thanks for sharing the link.