I tried both. But since, I assume, there are no images in this dataset (just .e57 colored pointclouds), the resulting model comes out as green only. No other colors.
In my regular photogrammetry sets where I have regular drone photos/videos with GRPs marked, I can do both, Colorize and Texturize to achieve the same result of colored XYZ point cloud on export. Colorize works faster, naturally, so I only texturize my models if I intend to export a mesh. For exporting XYZ color point clouds, Colorize is sufficient.
But in the case with only .e57 colored point clouds in the initial dataset (no photos) I can’t retain the point cloud colors. All points turn green.
hence, the original question.