I think the ring looks better. It takes better advantage of the 3-dimensional movement in the rivets. If I were to imagine what was designed first, I would say the bracelet/ring in the clash collection were designed before the pendant was added. The repeating pattern better suits that type of continuous, seamless design.
Also, like was mentioned earlier, I think this arc pendant design reminds of the Tiffany smile pendant. Similarly, though in the inverse, the smile pendant seems like it was designed first, with the smile bracelet added later as an afterthought.