In the paper we propose both kind of tests as viable post-editing productivity evaluation solutions as they both deliver a clear overview of the difference in speed between HT and PE of the translators involved. The decision on whether to use the first approach or the second can be based on a number of factors, such as: availability of actual orders in the domain and language combination to be tested; time; availability of Post-editors in the domain and in the language combination to be tested. The aim of this paper will be to show that both methodologies can be useful in different settings for a preliminary evaluation of possible productivity gain with MTPE.