When I went on the site with the injectors and put in 02 3.0i it pulled up the same injectors as the V8... 19lb injectors. It is
supposed to be the same flow rate but with a better tip/spray pattern making it more efficient. And more efficient combustion cycle would equal more power and better economy. (but not usually both at the same time, depending on how far down you press the skinny pedal

)
I'm not sure off hand how many spray holes the injectors in the 3.0i have as I simply didn't pay attention to that detail any time I had them off in the past, but the mustang injectors have 4 which does give a finer mist spray pattern for optimum combustion.