I was lied to when I bought my Z. I was just going by to look at them and the salesperson told me that the '12's were faster than the GT-R. The added oil cooler to keep the temps down and a bump on hp by tuning the ecu. I thought this was all nonsense but thought heck he works for Nissan so must be true so I signed my name on the dotted line....you can imagine my surprise when I lined up next to a GT-R and got smoked
So even though the above story is fictitous...the moral of the story is to not believe a salesperson.