At least I now know that I'm not off base in my first hand observations (after driving the 2012 3.8 Genesis that had a suspension that seemed awfully odd).
http://www.motortrend.com/roadtests..._300c_hyundai_genesis_comparison/viewall.html
Comparison: 2011 Chrysler 300C vs 2011 Hyundai Genesis
http://www.motortrend.com/roadtests..._300c_hyundai_genesis_comparison/viewall.html
Comparison: 2011 Chrysler 300C vs 2011 Hyundai Genesis
"The real test of these cars, though, is in ride quality, and again the 300C shines. While the 300C knows an SRT8 performance model is likely on the way and can relax a bit, the Genesis tries to be everything at once. The result is a Chrysler that floats down the road on a cloud and a Hyundai that rides like a sports sedan without the credentials to back it up. Worse, the front and rear suspension feel as though they're tuned for different cars, making the rear end nervous on patchy pavement. The Genesis may give its passengers more room, but the 300C gives them a better ride."