I don't still own an Original for side by side comparison, but doubt you'd notice any difference at all on basic quacks or series. The MVP has the same .010 reed thickness as the Original and most other calls, while cutdowns usually have .014 reeds that require more air or a different presentation of it.
In addition to my stock MVP, I also have one that Butch over-bored for a fellow wanting the loudest possible hunting call, and it, too, is easier to run (without changing my normal air presentation) than the three cutdowns I've had. Only time air becomes an issue with that over-bored MVP is when I've had to get on it loud and long to break distant birds and sometimes lacked the wind to stay on them hard to keep from losing them back to their original destination. With the standard MVP, I've no problem doing what it takes to break those "too far" birds and horse them on in, when need be.
If you think I'm wrong, you might be right.