RDS supported Database Engines vs RDS Features

As on 2017 RDS supports 6 Database Engines viz. MySQL, Oracle, SQL Server, PostgreSQL, MariaDB & Aurora. The below table depicts the comparison of 4 salient features of RDS - Automated Backup, Encryption, Multizone Availability and Read Replica

RDS Database	Automated Backup  & Snapshot	Encryption @ Rest	Multizone Availability	Read Replica
MySQL	Yes	Yes	Yes	Yes
Oracle	Yes	Yes	Yes	No
SQL Server	Yes	Yes	SQL Server Mirroring	No
PostgreSQL	Yes	Yes	Yes	Yes
MariaDB	Yes	Yes	Yes	Yes
Aurora	Yes	No	No	No