I’m all for someone checking part numbers but my guess is they’re the same. My 2016 is my first LC and I’ve been surprised at how much the rear is sensitive to weight versus other SUV’s I’ve owned. My guess us the HE sitting higher is simply due to the weight of the 3rd row being eliminated.
I use my LC to tow a @3700lb boat, which it does beautifully. But loaded with gear and passengers when towing, the LC sagged in the rear more than the Tahoe I had prior. I then had coil rite airbags installed, which work great, but even with no air in them the rear sits 1” higher than stock when unloaded. I had the OEM front coil spacers added to raise the front 1”, so now my truck has about the same rake as stock, just 1” higher.
My point is, the LC seems very sensitive to weight in the rear...I assume from long travel springs & shocks designed for off-road (vs other SUV stock setups). I’ll bet the slightly higher rear of the HE will disappear with 75# in the back, simulating the 3rd row. If I were buying a HE then I would definitely get the OEM coil spacers if not doing a suspension lift.
I would like to know too. I just saw one in the parking lot and its much taller in the rear on the HE than my 2016. I also noticed that the new HE had a lean to the right (passenger side) vs driver side like on my 16. There is no way the rear seats would affect the rear that much. Let us know what you or anyone else finds out. I tried the KDSS leveling mod with luck so I'm still on the prowl for some answers as far as rear springs.