User541108374 posted
Hi,
and welcome to the ASP.NET forums.
This is a rather subjective question as what works out great for me might be suboptimal for you. I suggest you set up a test application and have it connect to both and see what works out best for you.
On Azure you don't only have SQL SB but also CosmosDB, blob or table storage (think about cost) and there are also other open source based databases which recently went GA (General Available).
Update: the new databases are MySQL and PostgreSQL
Kris.