Mazda 6 - engine type - sebbike

Hi All,

Is there anyone knows what is the difference between the MZR 2.0 DISI and the 2.0 DOHC 16V petrol engine? Which one is better or is there any difference at all? I have seen the DISI engine in Mazda Takuya and the other one in the TS2 series.

Thank you