Completely different cars; the size alone should be a factor.
To make my 2012 550i M-sport acceptable to drive (coming from a 2009 550i M-Sport which was an awesome handling machine), I added: M-5 front Sway Bar; 550ix rear Sway Bar; 20" HRE P40 SC wheels with Mich PSS Tires; and Dinan State 2 Tune. Ahhh...much better. Of course, I also have a new Viper for even more "spirited" driving.
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