Azure Redis Cache adds new administration options which allows you to test your application for connection resiliency in case of a failure and also schedule updates to Azure Redis Cache. https://azure.microsoft.com/en-us/documentation/articles/cache-administration/
Pranav and Seth go in depth about Redis Cache and improving security.
Redis clustering gives you maximum scale and throughput. Azure Redis Cache offers Redis cluster as implemented in Redis. In Azure, Redis cluster is offered as a primary/replica model where each shard has a primary/replica pair with replication where the replication is managed by Azure Redis Cache service. https://azure.microsoft.com/en-us/documentation/articles/cache-how-to-premium-clustering/ http://redis.io/topics/cluster-tutorial
In this video we will look at some of the best practices on how should you pick the right Redis Cache offering for your use case. https://azure.microsoft.com/en-us/documentation/articles/cache-faq/