can you guys tell me whether the suspension is different 4.6vs4.8 in terms of stiffness, ride comfort, etc?

__________________
____________________
2010 BMW X6M (future car)
2006 BMW M6 Indy red/Portland Brown (sold)
2004 BMW X5 4.8is Silver/Black
2002 BMW X5 4.6is Black/Black (sold)
2004 Lexus RX330 Gold/Ivory (sold)
2000 Lexus GS 400 (sold)