It wasnt really the color that stood out to me but the leather appointments - I was told that the 3LT and the 3LZ replace the plastic door sill and dash components with leather and same for the middle glove compartment console - that and the Napa Leather upgrade. That's what stood out to me and added a nice taste of luxury.
I am sorry, I misunderstood your post.
You are correct: is indeed the case that the 3LT and 3LZ get Napa leather on the doors, dash and center console.
However, I spent quite a bit of time with a 2LT and a 3LT parked a few feet away from each other, moving back and forth between them. The views from five feet away were identical (ignoring the splash of color on the passenger's side of the dash in non-black 3LT interiors, which will be absent on all colors of 3LZ). Yes, to touch 2LT versus 3LT gave a noticeable difference. Getting 18 inches away gave a visual difference once I knew what to look for.
However, you can see my personal conclusions for myself in my signature below.
Yet, I understand your reasoning.