My $0.02 is from the perspective of a buyer. Assuming you do the math and figure our the margins on each product and get your pricing right first, I would rather have the option of buying slider(s). Two points: if I'm not really hungry, I would get a slider just to have a taste but would pass on a larger sandwich; if I am hungry, I would get 2 or 3 different sliders (i.e., pork chicken & brisket) to fill up and get variety.
Weber 26.75 OTG w/CI grates & SJ/WSM Mini
Home built 24"x72" reverse flow stick burner trailer with 18"x44" grill w/CI grates and upright SS gas oven/smoker.
Home built 48" fire pit with a 30"x30" Santa Maria style ranch grill.
Home built lump charcoal retort, iGrill & a bunch of other cooking toys.