The transparent Delphi has smaller pegs and closer holes than the Olympus and Olympus-Lite.  Accordingly, designs made on the Delphi are smaller and more delicate.  This is a great addition to the Olympus jigs since it facilitates making matching sets of jewelry.  For example, smaller earring components can be made on the Delphi to match larger necklace/bracelet links made on the Olympus.  It also works very well for paper arts designs.