The highway gas mileage difference isnt going to be that drastic between the two gears. But like I mentioned, after the 4.56s are available then it might make sense to appease the more conservative crowd with 4.10s.... BUT food for thought, if you have the 4.7L or the 5.7L and are concerned about gas mileage, then you're not going to regear to 4.10s since the 3.73s are sufficient. So even in that regard I dont see a market for 4.10s in this platform.

The lower gears would definitely help crawl ratio.