I spent the better part of three hours tying to find out the same thing after making a new character. Then I stumbled upon your post, which is the only thing I have found directly mentioning it. The closest thing I have found to it in-game is Ancestral High Elf Style. Ancestral High Elf Style seems to use the same models, but with slightly different textures. If you equip any of those starting sets and go to an outfit station you can see what I mean. Just make sure to check the box to "show locked" and filter by Ancestral High Elf, then you can click on the individual pieces to overlay them and see for yourself. It helps to use a bright color like "Forge Ember Red" from the dyes section first. The designs are identical, but the pieces from Balfiera have a more weathered and rusted texture. It is a minor difference, but not completely identical to the sets from the tutorial. Hope that helps!