I just went out and measured the difference in rear seat head room and leg room between our 2018 TRD Pro and our 2019 LX 570 (two-row), I made measurements with the drivers seat set to my preference and I am 5'10" and have a 31 inseam. Much to my surprise the leg room and the head room (measured from the top of the seat backs to the headliner) was nearly identical. I can attribute the room being similar to the much larger and more padded and larger bolsters of the LX seats in comparison to the almost toy-like seats in the 4Runner. Statistically speaking, the interior cu.in. volume numbers favor the LX over the GX in all respects and the LX is 4" wider. The GX when compared to the 4Runner is actually narrower and only bests the 4Runner in rear leg room by an inch. In most respects they are almost identical in all specs.
I have owned all of these vehicles and currently still own the TRD Pro 4Runner and the LX 570 and when you get down to it there is honestly very little perceived size/space differences amongst them. I can say that I always feel more confined in the front seat of the GX than I do in the other two, I think it has something to do with the center stack/console layout and the height of the dash.
Here's what I have to say about each of them.
5th Gen 4Runner: Best fuel economy, simple layout and design, nice aftermarket, fantastic off-road. Engine and transmission combo leave a little to be desired in the power delivery, but it's super simple and reliable. Feels cheap and plastic-like in comparison to the others. Excellent resale and reasonably priced. They are everywhere, that's both good and bad.
GX460: Nice interior appointments, delightful little V8 and six-speed transmission, okay fuel economy. Horrid cargo area with high floor design and the barn door is a love it or leave topic, most hate it, including myself. Dated interior but a new one is coming soon, still nice. Resale is sad, hordes of leases on these make for a flooded secondary market, bad for a seller but fantastic for a buyer, shop them right and you can get unbelievable deals on lightly used and CPO. These are gaining in popularity with the off-road world so the aftermarket is starting to pick up and they are rather easy to modify but they lack in options in comparison to the other two. No lockers, but can easily add MTC to those not equipped.
LX 570: Big V8, 8-speed tranny, very nice but barely acceptable to horrid fuel economy. Best ride and handling of the bunch, it feels like you're driving a bank vault down the road, very little to no road noise at all, obviously the best interior by a long shot. The price is shocking, but with that said they hold their value exceptionally well, just like the 4Runner and Land Cruiser. The 200-series in general has a decent aftermarket and are considered exceptional off-roaders, if not some of the best in the world. AHC is a fantastic tool and 33's fit stock, some have even made 35's work with the AHC lift-mod set to High. These are 350K+ trucks simply by following the recommended service intervals.
If we are talking new prices, one can nearly buy two TRD Pro's or TRD ORP for the price of one LX 570. The 4Runner is almost every bit the off-roader that the LX/LC is, but the 5th Gen will never match the comfort, quality, or overall fit and finish of its Lexus cousins. But that's not what the 4Runner is supposed to be and that's why the Lexus products exist.
The argument that the LX/LC are so much bigger isn't really valid either, while they feel bigger driving them, there is very little difference in their overall exterior dimensions other than length (hello bigger V8).
T4R GX LX/LC
Exterior
Length 190.7 in 192.1 in 200 in
Width 75.8 in 74.2 in 78 in
Height 71.5 in 74.2 in 75.2 in
Wheelbase 109.8 in 109.8 in 112.2 in
If I could only keep one it would undoubtedly be the LX, but if money and fuel economy were a factor then I would have no issue happily keeping the 4Runner and having 90% the vehicle for 50% of the cost. At the end of the day they are all fantastic vehicles that while different are very similar overall. They are all Toyota's and they will all outlast us and our needs if properly taken care of. I see the GX as a natural progression for those who like the overall size and capability of their 4Runner but want just a little bit more when it comes to refinement and power without having to spend the $80K+ for the 200-series. We will certainly be seeing more of these on the trails in the years to come.
Most of what you wrote is very true. For me, GX is the Goldilocks of the choices out there.
Recently, when i was shopping for GX/LX on used market, i did not see much difference in resale value. Lexus LX value drops quite a bit. I can get a 2 year old LX with 10k miles for just under $70k...maybe a few pennies more off with more haggling.
GX value drops by similar % for similar age. I cannot comment on 4runner because i was not shopping for it.
Now, the Land Cruiser is where you see much better resale value. Even though the two are similar, TLC clearly has better resale value than Lexus LX. A similar age TLC with more miles on odometer cost MORE than LX with less miles.
For me, because the used market price drop wasn’t enough, i am OCD (worry about what previous owner did to car), and Lexus dealer giving nice discount for new car, i decided to get a new GX instead of used. And when i was shopping, my salesman also said that they are discounting a lot on the LX too.
As for Land Cruiser, Toyota dealer did not want to deal much. I would have to pay at least $20k more than what i got GX for.
As i have said before, i would have gotten 4runner Limited if it came with KDSS, CRAWL, and pre-collision/adaptive cruise/blind spot. And i require full-time 4wd...so, the other 4runner models were ruled out. (2020 4runner at least now has more safety features.)
The TLC/LX are amazing vehicles. Build quality 2nd to none. Awesome sound system. Very nice interior. Off-road capable, but (like GX) hindered by low hanging plastic bumpers and huge rims. For me, i did not like the 2 row LX (or TLC in 2020) because i need 3rd row at times...for me, a 2row LX/LC is like a delete option despite paying same price. But then the 3rd row in regular 3-row LX is non-removable and takes up space. Clam shell back door is OK but makes it hard to reach in to get your stuff when the bottom door is down.
For me, i drive probably around 15-20k miles per year (splitting with my minivan). Fuel economy is not great in GX, but i am easily getting around 20 mpg at 75 mph...better if you cruiser slower. The LX i drove was significantly worst. In addition, i prefer the size of the GX...Goldilocks size. Not too big, but yet enough to carry my 3 kids in the 2nd row with emergency 3rd row if needed. The GX represents for me best compromise (luxury ride) for my long drives yet still half-decent fuel economy...thank goodness gas is cheap these days!
The GX barn door is weird but at least the rear window pops up to carry longer items and you can reach in to grab something quick from the cargo area (same as 4runner row down rear cargo window). The raised rear cargo floor is a bummer but at least the 3rd row is hidden (fold flat) when not in use vs. LX design clumsy 3rd row.
As for ride and comfort, i did not see much difference b/w GX and LX...both rides amazing. Quiet. Solid...maybe LX feels slightly more? The GX is definitely narrower inside. LX is roomier, no debate on this IMHO. My ONLY complaint of LX/LC interior is lack of space under the front seats when you’re sitting in 2nd row...thus less significantly legroom for 2nd row riders.
Since i drive a minivan (which is pretty big in every dimension), i can tell you that the biggest factor for me as a driver is width. Shorter in length is helpful but width is huge in navigating tight streets and parking space. Those few inches make a huge difference in real-word driving. The GX is almost like a sedan when you park it, esp when you have side camera (LX does too). The GX is so easy to drive (like 4runner) everywhere...size of the LX/Land Cruiser is a problem off-road too.
Of the 3 powertrains (LX, GX, 4runner), the one that i worry about most is the LX with the 8-speed auto. I did tons of reading on this during my shopping. Lexus/Toyota has been sending out updates on the 8-speed auto on both LX and Land Cruiser several times already. Shifting behavior is different than the older trannies. And there have been several stories of tranny failures on both Clublexus and ih8mud.
But for off-roading, LX/Land Cruiser is a clear winner...and Land Cruiser edging out LX. Much cleaner underbody vs. GX/4runner. More ground clearance for LX/LC. Hi mode is great on LX......but does limit articulation and is speed limited. But, problem for LX/LC off-road is purely related to its sheer size. Unlike 4runner Limited, both LX and GX have CRAWL...on GX, it is optional. MTS is less useful IMO. CRAWL is one of the reason why i got GX over 4runner. And GX has KDSS, which i love the concept of.
All vehicles have their strengths and weaknesses. My life circumstances favor the GX but that is because of my specific needs.