last year the ar6, t-hall, and the pcs, almost had the same dimensions but this year armada made the ar7 and t-hall wider in which provides a more stable ski on jumps and rails and gives it a more all mountain capability. the ar7 and t-hall have the ar50 construction that is also found on the alpha and the halo. the ar50 construction is a blend of cap and abs, the cap is in the tip and tails and th abs underfoot. the abs makes the ski more forgiving underfoot in absorbing the vibration on jump and rail contact, and it also makes the ski durable underfoot. the cap construction makes the swing weight lower and even in the tips and tails, making giving the user to make big spins, the cap makes the ski lighter and adds durability to the topsheet. the ar7 is stiffer than the pc, and it can handle any jump size and is still playful on jibs. the ar7 has the standard armada base so it doesnt need to be waxed as often as the pcs. for me i definitely choose the ar7 over the pc but thats my opinion.