Out of scope: Azure Database Development.
I am trying to decide between Visual Studio 2015 Database projects and SSDT.
I am using Visual Studio 2015 Database projects to develop and source control my SQL 2014 database application.
I understand that SSDT also provides a comprehensive and rich set of SQL database development features.
Which one of the VS15 DB Projects or SSDT are more powerful to developer SQL 2014 application.
I wish there was a comparison table that compares the two tools.
Conclusion
Based on the answers I understand that the two are very similar. Before this post, I was confused and I though they have a different set of capabilities, which is not correct.
SSDT database projects and VS2015 database projects are the same. "SSDT" used by itself refers to all the SQL Server features and tooling in Visual Studio, database projects included.
It would be great if you could also describe what problem you're hoping to solve by asking this question.