SQL Server - Difference between Index Rebuild and Index Reorganize

The below are the key differences between Index Rebuild and Reorganize .

S.No	Index Rebuild	Index Reorganize
1	Index Rebuild drops the existing Index and Recreates the index from scratch.	Index Reorganize physically reorganizes the leaf nodes of the index.
2	Rebuild the Index when an index is over 30% fragmented.	Reorganize the Index when an index is between 10% and 30% fragmented
3	Rebuilding takes more server resources and uses locks unless you use the ONLINE option available in 2005 Enterprise and Development editions.	Always prefer to do Reorganize the Index
4	T-SQL for Rebuilding all Indexes of a particular table. USE AdventureWorks; GO ALTER INDEX ALL ON HumanResources.Employee REBUILD GO	T-SQL for Reorganize all Indexes of a particular table. USE AdventureWorks; GO ALTER INDEX ALL ON HumanResources.Employee REORGANIZE GO