The Infamous is similar in design to the Punx park ski. It's a barely noticeable 2 mm wider than the Punx, with a slightly tighter, carvier sidecut radius and a bit more rocker tip and tail. It'll sell for about $100 less ($400 in many shops).
Atomic's Park Series includes two models with similar waist widths, the 84-mm Punx and 86-mm Infamous. Both feature Atomic's Stomp Sidecut, with longer radius in the tip and tail (to prevent surprising hookiness on takeoffs and landings) and tighter radius in the midsection (for carving into big hits). And they're optimized for switch riding, with symmetrical sidecut and rocker. Both models are built on wood cores, and both feature Atomic's Step-Down Sidewall construction: full sidewalls underfoot for solidity and edge grip; lower sidewalls topped by cap construction tip and tail for softer flex and torsional rigidity and more forgiving performance. Extra durable edges are designed to withstand the beatings of park use.