Model making question here for the experts.

I have a vroid model, one video says to import it into blender and then use cats to fix its shit and then export it as an fbx from blender into unity and the other says to just import the vrm file into unity directly before uploading to vrchat in order to convert it.
which method is correct and is my avatar going to lose out on anything if i just skip the blender step? will i lose eye tracking and mouth animation? the directly into unity video is a year newer than the blender video so i dont know if that has anything to do with it.