well yes it should..
f/
I'm not so sure.
Photoscan may prefer dealing with 5 images of 10 Mpix each acquired from 5 different view points than just one 50Mpix image.
I think the main advantage will be for applications working image per image (for instance traditional photogrammetry working on stereo pairs).
But of course replacing 10Mpix images by 50Mpix using the same camera positions will give more details, and hence a better model quality.
Comparing the same project acquired with different camera definitions will be very interesting !