The system performance does not depend only on the processor speed; there are other technologies involved that also contribute to performance. In this case, the difference between a 2.2 and a 2.4GHz Processor may be minimal. However, we would recommend you to follow the requirements from the software manufacturer.
Since both the required and the acquired processor share the same architecture, isn't the 0.2GHz the only difference (minus, maybe, 1 or 2MB of L3 cache)?
