Duratec 2.3L/Mazda’s MZR 2.3L

Does anyone know the difference between SEFI and MPFI? I was trying to compare the mazda6 MZR engine and fusion Duratec engine and the only difference I can see is the MPFI (really can't find any specs on the two:banghead: ). I’m sure there are other differences but I’m at the point were I might try to swap parts (aftermarket) to see if any of it will work.