Can some one tell me what the 3LZ package comes with?

Everything a 2LZ comes with and, additionally, a high grade leather, nav/PDR, IWE, and more. Perhaps the best way is to look at this link.

Model Information - Online Ordering Guide

As per the chart the BOBSZ06 has posted (thanks Bob), note that the competition seats comes instead with Mulan leather. As both met the same GM and wear abrasion standards before acceptance, believe that the Napa was determined to be too slippery for a competition seat.

Point this out, so none who purchase the comp seats are surprised upon arrival.