I am very new to this and I don't even know if I should ask this question here or on Stackoverflow or ServerFault.
I wish to set up a EC2 instance on Amazon Web Services. My understanding is RedHat Enterprise Linux(RHEL) cost $0.21/hour for an m1.Small more than Amazon Linux (which is free). Is my understanding correct? Is there any difference between the performance of RHEL and Amazon Linux? If I am looking for a free Linux which one should I go with in AWS EC2?