The Z comes across as a significantly more sporty car than the Genesis Coupe because the Genesis Coupe is quite a big bigger and softer, plus a good bit heavier comparing most trims.
Practical purposes, the Genesis Coupe is much more a GT car, like the Infiniti, albiet not as nice inside and much much cheaper. At least to the people I've talked to who own Genesis Coupes (I can think of one exception who's come to the dealership here) nearly nobody cross shopped a 370Z because they weren't looking for a hard edged sports car.
I know magazines and TCL view the Genesis Coupe as a sports car like the Nissan, but my experience working at a Hyundai dealer has shown that the people actually buying the Genesis Coupe don't view it as such.








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