First of all, Turkish sterling silver beads are handmade in Turkey, as the name implies. Bali sterling silver beads are handmade in Indonesia. Different artisans = a different type of bead. Turkish sterling silver beads are simply of a higher quality, in my opinion. The workmanship is excellent, with fine details and consistency from bead to bead. Turkish sterling silver also tends to be a bit lighter in weight, which is a nice design quality for jewelry. For example, a necklace made of all Bali sterling silver beads would feel like a lead weight, while a necklace made of all Turkish sterling silver would just have a nice heft to it. Turkish sterling silver also tends to be a little shinier, and does not need to be polished as often to maintain that shine. The down side is that it is pricier than Bali sterling silver.
Using Turkish sterling silver beads will take your jewelry designs to another level of quality and handmade craftmanship. Here are two great photos of Turkish sterling silver designs...and have a look at my Etsy shop for more examples. Just search on the word "Turkish" within my shop.