I compared the soce of the EPM2, the Sony NEX 5T and the EOS M2. In contrast with your writing, the Sony 5T and the EPM2 are so close they are nearly identical. At base ISO the 5T is somewhat better, but the rest...The EOS-M2 is not bad at all, but if it is not close to the 5T likeyour articel suggests than the same is true for the EPM2. However you conclude there is a difference but it is a small one. Do you look at your own graphs?