I would just use whatever I like, honestly. I wouldn’t be concerned with whether anyone else might notice. I don’t use scarves on my bag, but if I wanted to, I’d use LV or non-LV. I recently was gifted a beautiful handmade charm from Africa which I’m using on a DE tote. I have quite a few LV charms but I love this one and how it looks with the bag, and I’m sure it cost an extremely tiny fraction of what an LV charm costs, but that doesn’t matter. I very much doubt that an SA would care about that or about a generic unbranded scarf on your bag and if they did, who cares what they think?