Stud where fourth and fifth street land together instead of one at a time.
Button and blinds, not antes.
Two down cards and one up card, then the next two up cards dealt together, then a final up card.
Four rounds, matched to each dealing stage.
Best five-card hand — or hi/lo split, or lowest-hand-wins, depending on which flavor (Stud, Stud/8, or Razz-scored) is in play.
Worth knowing: Pot-limit by design.