Need help pulling the trigger

[sredmyer]

Hi all,

I have been on the forum for a couple of years now (since I bought my 2008 King Ranch). I am now considering updating to a 2011 and have a couple of questions.

First question is about the differences between my current truck which is a 2008 Job 1, CCLB, King Ranch with the FX4 package. The truck I am looking at is a 2011 CCLB King Ranch with the XL and XLT packages. A couple of differences I notice right away is that my truck has 20" wheels while the 2011 has 18s (those will get chaged right away) and my truck came with the navigation while the new one does not have it (this will also be fixed). What other differences are there that would not be so obvious?

Second question is more general...what are the main driveability and performance differences between the 6.4 and the 6.7?

Thanks for any insight.
Steve