It's a little confusing. The post says MZ3 bumper on a MS3 and the title says MS3 scoop on a MZ3. The fenders are different on the MS3, so I doubt the MZ3 bumper would fit on the MS3. Sorry to burst your bubble, OP. I'm not sure you could swap the hoods either, but it's more likely.^The OP said he wants to put a regular 3 front bumper on a Speed3, not the hood.
The easiest way to tell is the headlights. The crease next to them is further out on the MS3. The angle is a little different too.For photochop purposes, seems easier to just photochop the hood scoop on regular 3. Based on pics above, fenders look very similar to me and where it meets fender is exactly the same for both.