How is release testing different from system testing?

System Testing-System testing of software or hardware is testing conducted on a complete, integrated system to evaluate the system's compliance with its particular needs. System testing falls within the scope of black-box testing, and as such should require no idea of the inner design of the code or logic.

Release Testing Each release undergoes a series of automated and manual testing to ensure the quality of the finished product. In order to maximise our ability to find bugs before users do, we conduct a battery of tests designed to exercise as much functionality as possible. These tests emphasise variety over raw quantity, however, with each feature release requiring approximately a week of round-the-clock testing.