I like the 6 motif much better than the 11 motif. The 6 motif is more like an open bib necklace. Bib necklaces look great laying against skin. I'm not a fan of wearing the 6 motif over a round or crewneck top, as I think the neckline competes with the necklace and looks messy. That's just me.
I think the 6 motif looks best with big open necklines, deep v-necks, collared shirts.
For a chic casual summer look, aside from wearing it with an open neckline top, I like it with summer tunics.
To me, the 6 motif is an eclectic & romantic piece. It looks great with a tunic top for that flowy, romantic bohemian theme worn.
It creates kind of that carefree Marrakech vibe.
The 6 motif necklace really has to fit your fashion style.
As beautiful as it is, the 6 motif definitely does not fit my fashion style. I dress either super conservative for work (suits) or super casual after hours (striped tees), and I think the 6 motif doers not look good with either a jacket (wrong look) or a tee (too busy). I think a 20 looks great with a suit or a striped tee.
So think about your fashion look. See if the 6 motif fits your fashion look because no matter how gorgeous a piece is, if it does not work with your wardrobe, I would skip it.
Just my two cents for what it's worth. Hope that helps.