License states the following. All other modifications are not standardized and you can't just compare systems. Otherwise there would be another standardized benchmark in the list you propose to run and publish.

>c. Public Disclosure: You may not publicly disclose any performance results produced while using the Software except in the following circumstances: (1) as part of a TPC Benchmark Result. For purposes of this Agreement, a "TPC Benchmark Result" is a performance test submitted to the TPC, documented by a Full Disclosure Report and Executive Summary, claiming to meet the requirements of an official TPC Benchmark Standard. You agree that TPC Benchmark Results may only be published in accordance with the TPC Policies. viewable at http: //www.tpc.org (2) as part of an academic or research effort that does not imply or state a marketing position (3) any other use of the Software, provided that any performance results must be clearly identified as not being comparable to TPC Benchmark Results unless specifically authorized by TPC.