It looks like your triangles are much bigger in the latest version, are you sure you used the same settings for meshing?
Also, the more even lighting and the snow in the photos from earlier version is giving Photoscan a lot of useful details to extract depth from. I can imagine this also influences the quality of the reconstruction.
In the later version, you can see that the noisy areas line up with the parts that are in the shade. We are doing scans on a smaller scale, but we've seen similar problems with shaded areas, where Photoscan tries to extract depth from the ISO noise in shaded areas.