Difference between sampled_faces.npy and pointcloud.npz

[low5545]

Hi, I would like to ask what is the difference between the two files. From what I know, pointcloud.npz (as well as model.binvox, points.npz and img_choy2016) was originally from the dataset pre-processed by Occupancy Networks here. Upon my inspection, the first three columns of sampled_faces.npy gives the point cloud / sampled points on the mesh and the last three columns give the surface normals from the mesh. While both files contain 100000 samples, they don't exactly match in terms of the point coordinates and surface normals. With that, what is the distinction between the two? Thank you.