Sequence vs identity

Question

SQL Server 2012 introduced Sequence as a new feature, same as in Oracle and Postgres. Where sequences are preferred over identities? And why do we need sequence

Answer 1

I know this is a little old, but wanted to add an observation that bit me.

I switched from identity to sequence to have my indexes in order. I later found out that sequence doesn't transfer with replication. I started getting key violations after I setup replication between two databases since the sequences were not in sync. just something to watch out for before you make a decision.