Lexus IS250C = girly car,
Lexus IS350C = fit for a guy
honestly the style of the car is a unisex look, it would look hot with a girl in it, yet if it's powerful enough, a guy can make it look tight too. The 250C is a little smaller and weaker, still looking hot with a girl in it, whereas the 350C is the more manly edition...
And I think it'd be the perfect mix of masculinity and feminine for a couple to look good in...