have a G37 sedan, test drove 370Z, loved it but have few Qs and observations

casaforte9

I have a G37 sedan, test drove 370Z, loved it but have a few Q's

1) I test drove the 370z, owned a 350z 6 speed before , the 370z is soo much better

I test drove a 370Z Auto with 18" wheels and Auto 19" Sport Package. I like paddles shift transmissions and not keen on 6 speed ( drove it for yrs and now want paddles)

1) I drove extensively bothe cars AND
A) I felt the Std 18" wheels and tires roled better, supple ride and still was great in twisties
B) The sport package felt little cumbersome

I guess SP has better tires and LSD but 18's were awesome and lotsa grip, am i missing something, did someone else observe this?

Any feedback from current 18" wheel 370Z owners or from someone who drove them back to back will be appreciated

Thanks