P25pkg details / performance suspension

Hi, Just had a question at the end of this to see if anyone had any insight. First, my understanding is the AMG gets 486 - Sport Suspension as standard equipment.

For the P25pkg - AMG Driver's Package (optional $2,800) you get the following:

492 - AMG Performance Suspension with Stiffer/Firmer Dampening Characteristics
251 - Increased Top Speed to 167mph
U70 - Red Calipers
and one of the following
780 - Silver 19-Inch 16-Spoke Alloy
787 - Black 19-Inch 16-Spoke Alloy

My question is because of the high price of the package (calipers and wheel upgrades alone are $300 and $850 respectively); what exactly goes into the AMG Performance Suspension to make up for the higher value? One would think stiffer/firmer dampers wouldn't be so costly.

My dealer doesn't know anything... Maybe it's too early to tell? Thanks!