As im using RHEL-6 and oracle linux.
you are aware that those are TWO different operation systems ? right ?
RHEL 6 - a not free os from red hat.
This one you pay red hat to use .
Oracle unbreakable Linux 6
a also NOT free rebuild of RHEL6 and you pay Oracle to use it .
seeing as both of them require a paid for support contract
you might want to READ the red hat documents and read the Oracle documents
you have paid for the support , you might want to use it