Weigh the importance of the per second and per transaction data on the environment and the category you are measuring. The per transaction data is generally more meaningful in benchmarks or in test environments where the workload is well defined.
It is likely that you will find per transaction data more meaningful for comparing test data than per second data alone because in a benchmark test environment, there is usually a well-defined number of transactions, making comparison straightforward. Per transaction data is also useful for determining the validity of percentage results.
