ROTOR makes a lot of chainrings, so it can get confusing! But the differences here can be explained pretty easily.
These are a one-piece chainring design that saves weight while simultaneously increasing rigidity. Compared to a standard chainring with spider and bolts, the ROTOR DM ring is approximately 30 grams lighter by comparison. In addition, because the ring is made from a single piece of aluminum, rigidity is improved.
These are traditional 2-piece rings with a spider that bolts to the rings. The advantage to the 110×4 chainrings is they can fit both 110×4 cranksets (such as Shimano) as well as ROTOR cranks and power meters. In addition, they allow you to more easily change your chainring sizes in the future.