just purchased a new to me G37 vert non sport with premium package. why is there a different front end then other 2010 G37 verts?

 

you have non sport... they have sport. You should do some more research on other models before buying the car.

 

This is the 2009-2010 sport:



This the 2009-2010 base:

 

I believe starting in 2011 the non sport models came with the old sport bumper, and they redesigned the bumper for the sport models.

It's nothing you can't change if you don't like your bumper, I'm planning on either swapping out for a new ipl front , or 2011+ sport bumper in the future.