If you already run Apache Spark on Amazon EKS, you can get all of the benefits of Amazon EMR like automatic provisioning and scaling and the ability to use the latest fully managed versions of open source big data analytics frameworks. You get an optimized EMR runtime for Apache Spark with 3X faster performance than open source Apache Spark on EKS, a serverless data science experience with EMR Studio and Apache Spark UI, fine grained data access control, and support for data encryption.