I went from a 2020 LM2 (2wd) to a 26 LZ0 (4wd) and have been enjoying it a lot. I commute 60 miles, 1-way to work (120 round trip) from Orange County to Los Angeles. In the morning it takes my roughly 1-hour, heading home 1hr 45min - 2.5hours. My previous normal average was 30 - 33 mpg in my LM2 (modded with 3" lift, 33" tires, and a few PPE tubes). With the new stock truck (no mods, 31" tires, and 4x4), I average 28mpg. With the holidays, colder temps, and less traffic, I now jumped up to 30mpg. I use a fuel tracker and can confirm that the numbers on the dash are typically spot on with the actual driving.
Another thing I noticed, and maybe because it's new, but the DEF usage is much less. My background with DEF is, and is my opinion, that is is corrosive and crystalizes easily. Also being an emissions item, I don't like being less than half a tank. I figure with the heaters in the def tank and the way it can crystalize, I always want it full. Plus, when I get down to half a tank of DEF, it takes a single 2.5 gallon box. No over filling and spilling, no filling and realize you need more for full. My LM2 went about 2000-3000miles to a half tank (one box), and my first fill up in the LZ0 was 3770 miles. I hope this continues.
Below are some pics of the screen and mileage app